Document
false--12-31FY2019000010051700003196872000000000P20DP1Y1.600.025P20YP5Y41200000041200000042500000042500000080000008000000900000090000000.010.010.010.01100000000010001000000000100010001000269914769100025121638110000.02250.01050.00750.01750.0980.0270.04250.04250.04250.048750.050.050.060.060.250.450.500.150.300.351138000000014400000000.03955000000052000000590000006510000005130000002690000002100000001700000001813000000P30YP15YP40YP45YP15YP15YP25YP10YP1YP25YP3YP5YP3YP10Y 0000100517 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember 2019-01-01 2019-12-31 0000100517 2019-06-28 0000100517 ual:UnitedAirLinesIncMember 2020-02-18 0000100517 2020-02-18 0000100517 2017-01-01 2017-12-31 0000100517 us-gaap:ProductAndServiceOtherMember 2018-01-01 2018-12-31 0000100517 us-gaap:ProductAndServiceOtherMember 2017-01-01 2017-12-31 0000100517 us-gaap:ProductAndServiceOtherMember 2019-01-01 2019-12-31 0000100517 us-gaap:CargoAndFreightMember 2018-01-01 2018-12-31 0000100517 us-gaap:PassengerMember 2018-01-01 2018-12-31 0000100517 2018-01-01 2018-12-31 0000100517 us-gaap:CargoAndFreightMember 2017-01-01 2017-12-31 0000100517 us-gaap:CargoAndFreightMember 2019-01-01 2019-12-31 0000100517 us-gaap:PassengerMember 2017-01-01 2017-12-31 0000100517 us-gaap:PassengerMember 2019-01-01 2019-12-31 0000100517 2019-12-31 0000100517 2018-12-31 0000100517 2016-12-31 0000100517 2017-12-31 0000100517 us-gaap:CommonStockMember 2016-12-31 0000100517 us-gaap:CommonStockMember 2017-01-01 2017-12-31 0000100517 us-gaap:CommonStockMember 2018-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000100517 us-gaap:CommonStockMember 2018-01-01 2018-12-31 0000100517 us-gaap:RetainedEarningsMember 2019-12-31 0000100517 us-gaap:RetainedEarningsMember 2017-01-01 2017-12-31 0000100517 us-gaap:TreasuryStockMember 2017-01-01 2017-12-31 0000100517 us-gaap:TreasuryStockMember 2017-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2016-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2017-01-01 2017-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 0000100517 us-gaap:RetainedEarningsMember 2019-01-01 2019-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-01-01 2017-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2019-01-01 2019-12-31 0000100517 us-gaap:CommonStockMember 2019-01-01 2019-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0000100517 us-gaap:CommonStockMember 2019-12-31 0000100517 us-gaap:RetainedEarningsMember 2018-12-31 0000100517 us-gaap:TreasuryStockMember 2016-12-31 0000100517 us-gaap:TreasuryStockMember 2019-01-01 2019-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000100517 us-gaap:CommonStockMember 2017-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-12-31 0000100517 us-gaap:RetainedEarningsMember 2017-12-31 0000100517 us-gaap:TreasuryStockMember 2019-12-31 0000100517 us-gaap:TreasuryStockMember 2018-01-01 2018-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2016-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0000100517 us-gaap:RetainedEarningsMember 2016-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2019-12-31 0000100517 us-gaap:RetainedEarningsMember 2018-01-01 2018-12-31 0000100517 us-gaap:TreasuryStockMember 2018-12-31 0000100517 us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0000100517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0000100517 us-gaap:RetainedEarningsMember 2018-01-01 0000100517 2018-01-01 0000100517 ual:UnitedAirLinesIncMember us-gaap:PassengerMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ProductAndServiceOtherMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:CargoAndFreightMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:PassengerMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ProductAndServiceOtherMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:CargoAndFreightMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ProductAndServiceOtherMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:PassengerMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:CargoAndFreightMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember 2016-12-31 0000100517 ual:UnitedAirLinesIncMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2016-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2016-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:ReceivablesFromStockholderMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AdditionalPaidInCapitalMember 2016-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2016-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RetainedEarningsMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0000100517 us-gaap:SoftwareAndSoftwareDevelopmentCostsMember 2018-01-01 2018-12-31 0000100517 ual:AdvanceTicketSalesMember 2019-01-01 2019-12-31 0000100517 us-gaap:SoftwareAndSoftwareDevelopmentCostsMember 2019-01-01 2019-12-31 0000100517 us-gaap:ProductAndServiceOtherMember ual:ChaseAndOtherPartnerAgreementsMember 2019-01-01 2019-12-31 0000100517 us-gaap:ProductAndServiceOtherMember ual:ChaseAndOtherPartnerAgreementsMember 2018-01-01 2018-12-31 0000100517 ual:PassengerAncillaryFeesMember 2017-01-01 2017-12-31 0000100517 ual:PassengerAncillaryFeesMember 2018-01-01 2018-12-31 0000100517 ual:AdvanceTicketSalesMember 2018-01-01 2018-12-31 0000100517 us-gaap:SoftwareAndSoftwareDevelopmentCostsMember 2017-01-01 2017-12-31 0000100517 srt:MaximumMember 2019-01-01 2019-12-31 0000100517 us-gaap:ProductAndServiceOtherMember ual:ChaseAndOtherPartnerAgreementsMember 2017-01-01 2017-12-31 0000100517 ual:PassengerAncillaryFeesMember 2019-01-01 2019-12-31 0000100517 srt:ScenarioPreviouslyReportedMember 2017-01-01 2017-12-31 0000100517 srt:ScenarioPreviouslyReportedMember 2018-01-01 2018-12-31 0000100517 srt:RestatementAdjustmentMember us-gaap:AccountingStandardsUpdate201602Member 2017-01-01 2017-12-31 0000100517 srt:RestatementAdjustmentMember us-gaap:AccountingStandardsUpdate201602Member 2018-01-01 2018-12-31 0000100517 us-gaap:AtlanticDestinationMember 2018-01-01 2018-12-31 0000100517 us-gaap:LatinAmericaDestinationMember 2017-01-01 2017-12-31 0000100517 us-gaap:DomesticDestinationMember 2018-01-01 2018-12-31 0000100517 us-gaap:AtlanticDestinationMember 2019-01-01 2019-12-31 0000100517 us-gaap:DomesticDestinationMember 2019-01-01 2019-12-31 0000100517 us-gaap:PacificDestinationMember 2018-01-01 2018-12-31 0000100517 us-gaap:DomesticDestinationMember 2017-01-01 2017-12-31 0000100517 us-gaap:AtlanticDestinationMember 2017-01-01 2017-12-31 0000100517 us-gaap:LatinAmericaDestinationMember 2019-01-01 2019-12-31 0000100517 us-gaap:LatinAmericaDestinationMember 2018-01-01 2018-12-31 0000100517 us-gaap:PacificDestinationMember 2017-01-01 2017-12-31 0000100517 us-gaap:PacificDestinationMember 2019-01-01 2019-12-31 0000100517 ual:FrequentFlyerProgramMember 2017-12-31 0000100517 ual:FrequentFlyerProgramMember 2018-01-01 2018-12-31 0000100517 ual:FrequentFlyerProgramMember 2019-01-01 2019-12-31 0000100517 ual:FrequentFlyerProgramMember 2019-12-31 0000100517 ual:FrequentFlyerProgramMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember 2017-12-31 0000100517 us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember 2018-12-31 0000100517 us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember 2018-12-31 0000100517 us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember 2019-12-31 0000100517 ual:ContractsMember 2018-12-31 0000100517 ual:HubsMember 2019-12-31 0000100517 us-gaap:OtherIntangibleAssetsMember 2018-12-31 0000100517 ual:AirportSlotsAndGatesIndefiniteLivedMember 2019-12-31 0000100517 ual:FrequentFlyerDatabaseMember 2019-12-31 0000100517 ual:RouteAuthoritiesMember 2019-12-31 0000100517 ual:AlliancesMember 2018-12-31 0000100517 ual:AirportSlotsAndGatesIndefiniteLivedMember 2018-12-31 0000100517 us-gaap:OtherIntangibleAssetsMember 2019-12-31 0000100517 ual:TradenamesAndLogosMember 2019-12-31 0000100517 ual:HubsMember 2018-12-31 0000100517 ual:TradenamesAndLogosMember 2018-12-31 0000100517 ual:ContractsMember 2019-12-31 0000100517 ual:FrequentFlyerDatabaseMember 2018-12-31 0000100517 ual:AlliancesMember 2019-12-31 0000100517 ual:RouteAuthoritiesMember 2018-12-31 0000100517 srt:ScenarioPreviouslyReportedMember 2018-12-31 0000100517 srt:RestatementAdjustmentMember us-gaap:AccountingStandardsUpdate201602Member 2018-12-31 0000100517 srt:MinimumMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember us-gaap:SoftwareAndSoftwareDevelopmentCostsMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember us-gaap:BuildingMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember ual:AircraftSeatsMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember ual:AircraftSeatsMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember us-gaap:OtherCapitalizedPropertyPlantAndEquipmentMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember us-gaap:SoftwareAndSoftwareDevelopmentCostsMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember ual:AircraftAndRelatedRotablePartsMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember us-gaap:BuildingImprovementsMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember us-gaap:BuildingMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember ual:AircraftAndRelatedRotablePartsMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember us-gaap:BuildingImprovementsMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember us-gaap:OtherCapitalizedPropertyPlantAndEquipmentMember 2019-01-01 2019-12-31 0000100517 2019-07-31 0000100517 us-gaap:RestrictedStockUnitsRSUMember 2019-01-01 2019-12-31 0000100517 us-gaap:RestrictedStockUnitsRSUMember 2019-12-31 0000100517 us-gaap:EmployeeStockOptionMember 2019-12-31 0000100517 us-gaap:EmployeeStockOptionMember 2019-01-01 2019-12-31 0000100517 us-gaap:RestrictedStockMember 2017-01-01 2017-12-31 0000100517 us-gaap:RestrictedStockMember 2018-01-01 2018-12-31 0000100517 us-gaap:RestrictedStockUnitsRSUMember 2018-01-01 2018-12-31 0000100517 us-gaap:EmployeeStockOptionMember 2017-01-01 2017-12-31 0000100517 us-gaap:RestrictedStockUnitsRSUMember 2017-01-01 2017-12-31 0000100517 us-gaap:EmployeeStockOptionMember 2018-01-01 2018-12-31 0000100517 us-gaap:RestrictedStockMember 2019-01-01 2019-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2017-01-01 2017-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2019-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2019-01-01 2019-12-31 0000100517 us-gaap:RestrictedStockMember 2017-12-31 0000100517 us-gaap:RestrictedStockMember 2016-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2018-01-01 2018-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2017-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2017-01-01 2017-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2019-01-01 2019-12-31 0000100517 us-gaap:RestrictedStockMember 2018-12-31 0000100517 us-gaap:RestrictedStockMember 2019-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2018-01-01 2018-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2016-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2018-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2018-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2016-12-31 0000100517 ual:RestrictedStockUnitsRSUsEquityAwardsMember 2017-12-31 0000100517 ual:RestrictedStockUnitsRSUsLiabilityAwardsMember 2019-12-31 0000100517 ual:TimeVestedRestrictedStockUnitsRSUsMember 2019-01-01 2019-12-31 0000100517 ual:PerformanceBasedRestrictedStockUnitsRSUsMember 2019-01-01 2019-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2016-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-01-01 2019-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-01-01 2018-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-01-01 2019-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2016-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-01-01 2017-12-31 0000100517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-01-01 2017-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-12-31 0000100517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-12-31 0000100517 ual:NetOperatingLossCarryForwardExpirationYear2033Member 2019-12-31 0000100517 us-gaap:StateAndLocalJurisdictionMember 2019-12-31 0000100517 us-gaap:DomesticCountryMember 2019-12-31 0000100517 ual:NetOperatingLossCarryForwardExpirationYear2030Member 2019-12-31 0000100517 ual:NetOperatingLossCarryForwardExpirationPeriodThereafterMember 2019-12-31 0000100517 srt:MinimumMember us-gaap:StateAndLocalJurisdictionMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember us-gaap:StateAndLocalJurisdictionMember 2019-01-01 2019-12-31 0000100517 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:PensionPlansDefinedBenefitMember 2017-01-01 2017-12-31 0000100517 us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000100517 us-gaap:PensionPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000100517 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000100517 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2017-01-01 2017-12-31 0000100517 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000100517 us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MinimumMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MaximumMember 2019-01-01 2019-12-31 0000100517 ual:InternationalAssociationOfMachinistsNationalPensionPlanMember 2018-01-01 2018-12-31 0000100517 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2019-01-01 2019-12-31 0000100517 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2019-12-31 0000100517 us-gaap:PensionPlansDefinedBenefitMember 2017-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:AlternativeMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:DefinedBenefitPlanEquitySecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:AlternativeMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:AlternativeMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 ual:DepositAdministrationFundMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:OtherInvestmentsMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000100517 us-gaap:FixedIncomeFundsMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000100517 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2017-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:DefinedBenefitPlanEquitySecuritiesMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember ual:AlternativeMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:FixedIncomeFundsMember 2019-01-01 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member 2018-01-01 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member 2017-12-31 0000100517 us-gaap:FairValueInputsLevel3Member 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member 2019-01-01 2019-12-31 0000100517 ual:InternationalAssociationOfMachinistsNationalPensionPlanMember us-gaap:MultiemployerPlansPensionMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember ual:InternationalAssociationOfMachinistsNationalPensionPlanMember us-gaap:MultiemployerPlansPensionMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember ual:InternationalAssociationOfMachinistsNationalPensionPlanMember us-gaap:MultiemployerPlansPensionMember 2018-01-01 2018-12-31 0000100517 ual:UnitedAirLinesIncMember ual:InternationalAssociationOfMachinistsNationalPensionPlanMember us-gaap:MultiemployerPlansPensionMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MinimumMember us-gaap:DefinedBenefitPlanEquitySecuritiesMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MinimumMember us-gaap:FixedIncomeFundsMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MaximumMember us-gaap:FixedIncomeFundsMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MaximumMember ual:AlternativeMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MinimumMember ual:AlternativeMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember srt:MaximumMember us-gaap:DefinedBenefitPlanEquitySecuritiesMember 2019-12-31 0000100517 ual:UnitedAirlinesInc.andKingslandInternationalGroupS.A.Member ual:AviancaHoldingsS.A.AVHMember ual:ConvertibleTermLoanMember 2019-11-18 0000100517 ual:BRWAviationHoldingLLCAndBRWAviationLLCBRWMember ual:TermLoanReceivableMember 2018-11-30 0000100517 ual:UnitedAirLinesIncMember ual:AviancaHoldingsS.A.AVHMember ual:ConvertibleTermLoanMember 2019-12-01 2019-12-31 0000100517 ual:UnitedAirlinesInc.andKingslandInternationalGroupS.A.Member ual:AviancaHoldingsS.A.AVHMember ual:ConvertibleTermLoanMember 2019-12-31 0000100517 ual:BRWAviationHoldingLLCAndBRWAviationLLCBRWMember ual:TermLoanReceivableMember 2019-12-31 0000100517 ual:AzulMember us-gaap:PreferredStockMember 2019-12-31 0000100517 us-gaap:CorporateDebtSecuritiesMember 2019-01-01 2019-12-31 0000100517 ual:ManaAirLLCMember 2019-12-31 0000100517 ual:FulcrumBioEnergyInc.Member us-gaap:PreferredStockMember 2019-12-31 0000100517 ual:FulcrumBioEnergyInc.Member 2019-12-31 0000100517 ual:AzulMember 2019-12-31 0000100517 us-gaap:FixedIncomeSecuritiesMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember us-gaap:AssetBackedSecuritiesMember 2019-01-01 2019-12-31 0000100517 ual:UsGovernmentAgenciesDebtSecuritiesAndOtherFixedIncomeSecuritiesMember 2019-01-01 2019-12-31 0000100517 ual:RepublicAirwaysHoldingsInc.Member 2019-12-31 0000100517 ual:ChamplainEnterprisesLLCMember 2019-12-31 0000100517 us-gaap:CertificatesOfDepositMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember us-gaap:AssetBackedSecuritiesMember 2019-01-01 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2018-12-31 0000100517 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember ual:OtherShortTermInvestmentsMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2019-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2019-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember ual:OtherShortTermInvestmentsMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2018-12-31 0000100517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CertificatesOfDepositMember 2018-12-31 0000100517 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000100517 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-12-31 0000100517 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000100517 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2018-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-12-31 0000100517 us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000100517 ual:ClassAPassThroughCertificatesIssuedSeptember2019Member ual:PassThroughCertificatesMember 2019-01-01 2019-12-31 0000100517 ual:ClassAAPassThroughCertificatesIssuedFebruary2019Member ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:ClassBPassThroughCertificatesIssuedSeptember2019Member ual:PassThroughCertificatesMember 2019-01-01 2019-12-31 0000100517 ual:ClassAPassThroughCertificatesIssuedFebruary2019Member ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:ClassAPassThroughCertificatesIssuedFebruary2019Member ual:PassThroughCertificatesMember 2019-01-01 2019-12-31 0000100517 ual:ClassAPassThroughCertificatesIssuedSeptember2019Member ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:PassThroughCertificatesMember 2019-01-01 2019-12-31 0000100517 ual:ClassAAPassThroughCertificatesIssuedSeptember2019Member ual:PassThroughCertificatesMember 2019-01-01 2019-12-31 0000100517 ual:ClassAAPassThroughCertificatesIssuedFebruary2019Member ual:PassThroughCertificatesMember 2019-01-01 2019-12-31 0000100517 ual:ClassAAPassThroughCertificatesIssuedSeptember2019Member ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:ClassBPassThroughCertificatesIssuedSeptember2019Member ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:TermLoanMember us-gaap:LineOfCreditMember 2019-12-31 0000100517 ual:A4.875SeniorNotesDue2025Member us-gaap:SeniorNotesMember 2019-05-31 0000100517 ual:SpecialFacilityRevenueBondsMember us-gaap:SecuredDebtMember 2019-12-31 0000100517 ual:TermLoanMember us-gaap:LineOfCreditMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-01-01 2019-12-31 0000100517 ual:AircraftPurchaseFinancingLoansMember us-gaap:SecuredDebtMember 2019-12-31 0000100517 us-gaap:RevolvingCreditFacilityMember us-gaap:LineOfCreditMember ual:CertainMarketInterestRatesMember 2019-01-01 2019-12-31 0000100517 ual:Boeing737MaxMember 2019-12-31 0000100517 us-gaap:RevolvingCreditFacilityMember us-gaap:LineOfCreditMember 2019-01-01 2019-12-31 0000100517 ual:PassThroughCertificatesMember 2019-12-31 0000100517 ual:SpecialFacilityRevenueBondsMember us-gaap:MortgagesMember 2019-12-31 0000100517 us-gaap:RevolvingCreditFacilityMember us-gaap:LineOfCreditMember 2019-12-31 0000100517 us-gaap:RevolvingCreditFacilityMember us-gaap:LineOfCreditMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-01-01 2019-12-31 0000100517 ual:TermLoanMember us-gaap:LineOfCreditMember ual:CertainMarketInterestRatesMember 2019-01-01 2019-12-31 0000100517 ual:A4.875SeniorNotesDue2025Member us-gaap:UnsecuredDebtMember 2018-12-31 0000100517 ual:A6SeniorNotesDue2020Member us-gaap:UnsecuredDebtMember 2019-12-31 0000100517 ual:A6SeniorNotesDue2020Member us-gaap:UnsecuredDebtMember 2018-12-31 0000100517 ual:TermLoanDue2024Member us-gaap:SecuredDebtMember 2018-12-31 0000100517 ual:A4.875SeniorNotesDue2025Member us-gaap:UnsecuredDebtMember 2019-12-31 0000100517 ual:A5SeniorNotesDue2024Member us-gaap:UnsecuredDebtMember 2019-12-31 0000100517 ual:NotesPayableFixedInterestRatesMember us-gaap:SecuredDebtMember 2019-12-31 0000100517 ual:OtherDebtMember us-gaap:UnsecuredDebtMember 2019-12-31 0000100517 ual:NotesPayableFixedInterestRatesMember us-gaap:SecuredDebtMember 2018-12-31 0000100517 ual:TermLoanDue2024Member us-gaap:SecuredDebtMember 2019-12-31 0000100517 ual:OtherDebtMember us-gaap:UnsecuredDebtMember 2018-12-31 0000100517 ual:A5SeniorNotesDue2024Member us-gaap:UnsecuredDebtMember 2018-12-31 0000100517 ual:NotesPayableFloatingInterestRatesMember us-gaap:SecuredDebtMember 2019-12-31 0000100517 ual:A4.25SeniorNotesDue2022Member us-gaap:UnsecuredDebtMember 2018-12-31 0000100517 ual:NotesPayableFloatingInterestRatesMember us-gaap:SecuredDebtMember 2018-12-31 0000100517 ual:A4.25SeniorNotesDue2022Member us-gaap:UnsecuredDebtMember 2019-12-31 0000100517 ual:UalAndUnitedMember 2019-12-31 0000100517 srt:MaximumMember ual:NotesPayableFixedInterestRatesMember us-gaap:SecuredDebtMember 2019-12-31 0000100517 srt:MinimumMember ual:NotesPayableFloatingInterestRatesMember us-gaap:SecuredDebtMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-01-01 2019-12-31 0000100517 ual:TermLoanDue2024Member us-gaap:SecuredDebtMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-01-01 2019-12-31 0000100517 ual:TermLoanDue2024Member us-gaap:SecuredDebtMember ual:CertainMarketInterestRatesMember 2019-01-01 2019-12-31 0000100517 srt:MaximumMember ual:NotesPayableFloatingInterestRatesMember us-gaap:SecuredDebtMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-01-01 2019-12-31 0000100517 srt:MinimumMember ual:NotesPayableFixedInterestRatesMember us-gaap:SecuredDebtMember 2019-12-31 0000100517 ual:A5SeniorNotesDue2024Member 2019-12-31 0000100517 ual:A4.875SeniorNotesDue2025Member 2019-12-31 0000100517 ual:CreditAgreementMember 2019-12-31 0000100517 ual:A6SeniorNotesDue2020Member 2019-12-31 0000100517 ual:A4.25SeniorNotesDue2022Member 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:CollateralizedDebtObligationsMember 2019-01-01 2019-12-31 0000100517 srt:ScenarioForecastMember ual:CapacityPurchaseAgreementsMember 2020-01-01 2020-12-31 0000100517 us-gaap:MainlineMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RegionalCarrierMember ual:CapacityPurchaseAgreementsMember 2017-01-01 2017-12-31 0000100517 ual:UnitedAirLinesIncMember ual:EmbraerE175LLMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RegionalCarrierMember ual:CapacityPurchaseAgreementsMember 2019-12-31 0000100517 ual:NonAircraftMember srt:MinimumMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember ual:BombardierCRJ550Member 2019-01-01 2019-12-31 0000100517 ual:NonAircraftMember srt:MaximumMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember ual:EmbraerE175Member 2019-01-01 2019-12-31 0000100517 us-gaap:MainlineMember srt:MinimumMember 2019-01-01 2019-12-31 0000100517 us-gaap:RegionalCarrierMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RegionalCarrierMember ual:CapacityPurchaseAgreementsMember 2018-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RegionalCarrierMember ual:CapacityPurchaseAgreementsMember 2018-01-01 2018-12-31 0000100517 us-gaap:MainlineMember srt:MaximumMember 2019-01-01 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:RegionalCarrierMember ual:CapacityPurchaseAgreementsMember 2019-01-01 2019-12-31 0000100517 ual:TaxExemptBondsMember 2019-12-31 0000100517 ual:TaxExemptBondsMember us-gaap:IndirectGuaranteeOfIndebtednessMember 2019-12-31 0000100517 ual:FloatingRateDebtMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:SuretyBondMember 2019-12-31 0000100517 ual:KingslandHoldingsLimitedMember 2019-12-31 0000100517 ual:EmbraerE175Member 2019-12-31 0000100517 ual:Boeing737700Member 2019-12-31 0000100517 ual:KingslandHoldingsLimitedMember 2018-12-31 0000100517 ual:TaxExemptBondsMember 2019-12-31 0000100517 ual:AircraftMortgageDebtMember 2019-12-31 0000100517 ual:FloatingRateDebtMember 2019-01-01 2019-12-31 0000100517 ual:LoansAndLeasesFromNonUSEntitiesMember 2019-01-01 2019-12-31 0000100517 ual:LoansAndLeasesFromNonUSEntitiesMember 2019-12-31 0000100517 ual:AirbusA319sMember 2019-12-31 0000100517 ual:UnitedAirLinesIncMember us-gaap:LetterOfCreditMember us-gaap:CollateralizedDebtObligationsMember 2019-12-31 0000100517 ual:AirbusA350Member 2019-12-31 0000100517 srt:B777300Member 2019-12-31 0000100517 ual:AirbusA321XLRMember 2019-12-31 0000100517 ual:Boeing787Member 2019-12-31 0000100517 ual:InternationalBrotherhoodOfTeamstersMember 2017-01-01 2017-12-31 0000100517 ual:InternationalBrotherhoodOfTeamstersMember ual:VoluntaryEarlyOutProgramMember 2017-03-31 0000100517 ual:AircraftEnginesMember 2019-01-01 2019-12-31 0000100517 ual:InternationalBrotherhoodOfTeamstersMember 2019-01-01 2019-12-31 0000100517 ual:InternationalBrotherhoodOfTeamstersMember 2018-01-01 2018-12-31 0000100517 ual:ManagementReorganizationInitiativeMember 2017-01-01 2017-12-31 0000100517 ual:AirlineRoutesHongKongMember 2018-01-01 2018-12-31 0000100517 srt:ManagementMember 2018-01-01 2018-12-31 0000100517 ual:AzulMember 2019-01-01 2019-12-31 0000100517 ual:InternationalBrotherhoodOfTeamstersMember ual:VoluntaryEarlyOutProgramMember 2017-01-01 2017-03-31 0000100517 ual:AirlineRoutesBrazilMember 2018-05-01 2018-05-31 0000100517 ual:ObsoleteSparePartsInventoryMember 2017-01-01 2017-12-31 0000100517 ual:AirlineRoutesHongKongMember 2019-10-01 2019-12-31 0000100517 ual:MaintenanceServiceAgreementMember 2017-01-01 2017-12-31 0000100517 srt:ManagementMember 2019-01-01 2019-12-31 0000100517 2018-01-01 2018-03-31 0000100517 2019-10-01 2019-12-31 0000100517 2019-07-01 2019-09-30 0000100517 2018-10-01 2018-12-31 0000100517 2019-04-01 2019-06-30 0000100517 2019-01-01 2019-03-31 0000100517 2018-07-01 2018-09-30 0000100517 2018-04-01 2018-06-30 0000100517 country:CN srt:ScenarioForecastMember us-gaap:SubsequentEventMember 2020-01-01 2020-12-31 0000100517 country:CN us-gaap:SubsequentEventMember 2020-02-24 0000100517 ual:TransPacificCountriesExcludingChinaMember srt:ScenarioForecastMember us-gaap:SubsequentEventMember 2020-01-01 2020-12-31 0000100517 ual:TransPacificCountriesExcludingChinaMember us-gaap:SubsequentEventMember 2020-02-24 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2018-01-01 2018-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2017-12-31 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2018-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2017-12-31 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2017-01-01 2017-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2019-01-01 2019-12-31 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2019-01-01 2019-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2018-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2018-01-01 2018-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2019-01-01 2019-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2017-01-01 2017-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2019-12-31 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2016-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2018-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2018-01-01 2018-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2017-01-01 2017-12-31 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2017-12-31 0000100517 ual:UalAndUnitedMember us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2019-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2019-12-31 0000100517 ual:UalAndUnitedMember us-gaap:AllowanceForCreditLossMember 2016-12-31 0000100517 ual:UalAndUnitedMember us-gaap:InventoryValuationReserveMember 2016-12-31 iso4217:USD iso4217:USD xbrli:shares xbrli:shares xbrli:pure ual:Aircraft ual:adr ual:Employee ual:commitment ual:aircraft ual:Option

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
FORM
10-K
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2019
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                      to               
 https://cdn.kscope.io/e241014cc2b8395930eba8a3e1e5aeca-unitedcoverlogoa01.jpg
 
Commission
File Number
 
Exact Name of Registrant as Specified in its Charter, 
Principal Executive Office Address and Telephone Number
 
State of
Incorporation
 
I.R.S. Employer
Identification No.
 
001-06033
 
United Airlines Holdings, Inc.
 
Delaware
 
36-2675207
 
 
 
233 South Wacker Drive,
Chicago,
Illinois
60606
 
 
 
 
 
 
 
(872)
825-4000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
001-10323
 
United Airlines, Inc.
 
Delaware
 
74-2099724
 
 
 
233 South Wacker Drive,
Chicago,
Illinois
60606
 
 
 
 
 
 
 
(872)
825-4000
 
 
 
 
 
 
 
 
 
Securities registered pursuant to Section 12(b) of the Act:
 
 
Title of Each Class
 
Trading Symbol
 
Name of Each Exchange on Which Registered
United Airlines Holdings, Inc.
 
Common Stock, $0.01 par value
 
UAL
 
The Nasdaq Stock Market LLC
United Airlines, Inc.
 
None
 
None
 
None
Securities registered pursuant to Section 12(g) of the Act:
 
United Airlines Holdings, Inc.
 
None
 
 
United Airlines, Inc.
 
None
 
 
 
 
 
 
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act
United Airlines Holdings, Inc.
 
Yes
No
 
United Airlines, Inc.
 
Yes
No
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.
United Airlines Holdings, Inc.
 
Yes
No
 
United Airlines, Inc.
 
Yes
No
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
United Airlines Holdings, Inc.
 
Yes
No
 
United Airlines, Inc.
 
Yes
No
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this Chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). 
United Airlines Holdings, Inc.
 
Yes
No
 
United Airlines, Inc.
 
Yes
No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
United Airlines Holdings, Inc.
Large accelerated filer
Accelerated filer
Non-accelerated filer
Smaller reporting company
Emerging growth company
United Airlines, Inc.
Large accelerated filer
Accelerated filer
Non-accelerated filer
Smaller reporting company
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
United Airlines Holdings, Inc.
 
United Airlines, Inc.
 
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
United Airlines Holdings, Inc.
 
Yes    
No
 
United Airlines, Inc.
  
Yes
No
 
The aggregate market value of common stock held by non-affiliates of United Airlines Holdings, Inc. was $21.1 billion as of June 28, 2019, based on the closing sale price of $87.55 on that date. There is no market for United Airlines, Inc. common stock.
Indicate the number of shares outstanding of each of the registrant's classes of common stock, as of February 18, 2020.
United Airlines Holdings, Inc.
 
247,951,116
shares of common stock ($0.01 par value)
United Airlines, Inc.
 
1,000
shares of common stock ($0.01 par value) (100% owned by United Airlines Holdings, Inc.)
This combined Form 10-K is separately filed by United Airlines Holdings, Inc. and United Airlines, Inc.
OMISSION OF CERTAIN INFORMATION
United Airlines, Inc. meets the conditions set forth in General Instruction I(1)(a) and (b) of Form 10-K and is therefore filing this form with the reduced disclosure format allowed under that General Instruction.
DOCUMENTS INCORPORATED BY REFERENCE
Certain information required by Items 10, 11, 12 and 13 of Part III of this Form 10-K is incorporated by reference for United Airlines Holdings, Inc. from its definitive proxy statement for its 2020 Annual Meeting of Stockholders.



United Airlines Holdings, Inc. and Subsidiary Companies
United Airlines, Inc. and Subsidiary Companies
Annual Report on Form 10-K
For the Year Ended December 31, 2019
 
 
 
 
 
 
 
 
Page
PART I
Item 1.
 
Item 1A.
 
Item 1B.
 
Item 2.
 
Item 3.
 
Item 4.
 
 
 
 
 
PART II
Item 5.
 
Item 6.
 
Item 7.
 
Item 7A.
 
Item 8.
 
 
 
Item 9.
 
Item 9A.
 
Item 9B.
 
 
 
 
 
PART III
Item 10.
 
Item 11.
 
Item 12.
 
Item 13.
 
Item 14.
 
 
 
 
 
PART IV
Item 15.
 
Item 16.
 



This Annual Report on Form 10-K ("Form 10-K") contains various "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Forward-looking statements represent our expectations and beliefs concerning future results or events, based on information available to us on the date of the filing of this Form 10-K, and are subject to various risks and uncertainties. Factors that could cause actual results or events to differ materially from those referenced in the forward-looking statements are listed in Part I, Item 1A. Risk Factors and in Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations. We disclaim any intent or obligation to update or revise any of the forward-looking statements, whether in response to new information, unforeseen events, changed circumstances or otherwise, except as required by applicable law.
PART I

ITEM 1.    BUSINESS.
Overview
United Airlines Holdings, Inc. (together with its consolidated subsidiaries, "UAL" or the "Company") is a holding company and its principal, wholly-owned subsidiary is United Airlines, Inc. (together with its consolidated subsidiaries, "United"). As UAL consolidates United for financial statement purposes, disclosures that relate to activities of United also apply to UAL, unless otherwise noted. United's operating revenues and operating expenses comprise nearly 100% of UAL's revenues and operating expenses. In addition, United comprises approximately the entire balance of UAL's assets, liabilities and operating cash flows. When appropriate, UAL and United are named specifically for their individual contractual obligations and related disclosures and any significant differences between the operations and results of UAL and United are separately disclosed and explained. We sometimes use the words "we," "our," "us," and the "Company" in this report for disclosures that relate to all of UAL and United.
UAL was incorporated under the laws of the State of Delaware on December 30, 1968. Effective June 27, 2019, UAL amended its Certificate of Incorporation to change its name to "United Airlines Holdings, Inc." Our principal executive office is located at 233 South Wacker Drive, Chicago, Illinois 60606 (telephone number (872) 825-4000).
The Company's website is located at www.united.com and its investor relations website is located at ir.united.com. The information contained on or connected to the Company's websites is not incorporated by reference into this Annual Report on Form 10-K and should not be considered part of this or any other report filed with the U.S. Securities and Exchange Commission ("SEC"). The Company's filings with the SEC, including annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and all amendments to those reports, as well as UAL's proxy statement for its annual meeting of stockholders, are accessible without charge on the Company's investor relations website, as soon as reasonably practicable, after such material is electronically filed with, or furnished to, the SEC. Such filings are also available on the SEC's website at www.sec.gov.
Operations
The Company transports people and cargo throughout North America and to destinations in Asia, Europe, Africa, the Pacific, the Middle East and Latin America. UAL, through United and its regional carriers, operates more than 4,900 flights a day to 362 airports across six continents, with hubs at Newark Liberty International Airport ("Newark"), Chicago O'Hare International Airport ("Chicago O'Hare"), Denver International Airport ("Denver"), George Bush Intercontinental Airport ("Houston Bush"), Los Angeles International Airport ("LAX"), A.B. Won Pat International Airport ("Guam"), San Francisco International Airport ("SFO") and Washington Dulles International Airport ("Washington Dulles").
All of the Company's domestic hubs are located in large business and population centers, contributing to a large amount of "origin and destination" traffic. The hub and spoke system allows us to transport passengers between a large number of destinations with substantially more frequent service than if each route were served directly. The hub system also allows us to add service to a new destination from a large number of cities using only one or a limited number of aircraft. As discussed under Alliances below, United is a member of Star Alliance, the world's largest alliance network.
Regional. The Company has contractual relationships with various regional carriers to provide regional aircraft service branded as United Express. This regional service complements our operations by carrying traffic that connects to our hubs and allows flights to smaller cities that cannot be provided economically with mainline aircraft. Champlain Enterprises, LLC d/b/a CommutAir ("CommutAir"), Republic Airline Inc. ("Republic"), ExpressJet Airlines LLC ("ExpressJet"), GoJet Airlines LLC ("GoJet"), Mesa Airlines, Inc. ("Mesa"), SkyWest Airlines, Inc. ("SkyWest"), Air Wisconsin Airlines LLC ("Air Wisconsin"), and Trans States Airlines, LLC ("Trans States") are all regional carriers that operate with capacity contracted to United under capacity purchase agreements ("CPAs"). Under these CPAs, the Company pays the regional carriers contractually agreed fees

3


(carrier costs) for operating these flights plus a variable rate adjustment based on agreed performance metrics, subject to annual adjustments. The fees are based on specific rates multiplied by specific operating statistics (e.g., block hours, departures), as well as fixed monthly amounts. Under these CPAs, the Company is also responsible for all fuel costs incurred, as well as landing fees and other costs, which are either passed through by the regional carrier to the Company without any markup or directly incurred by the Company. In some cases, the Company owns some or all of the aircraft subject to the CPA and leases such aircraft to the regional carrier. In return, the regional carriers operate the capacity of the aircraft included within the scope of such CPA exclusively for United, on schedules determined by the Company. The Company also determines pricing and revenue management, assumes the inventory and distribution risk for the available seats and permits mileage accrual and redemption for regional flights through its MileagePlus loyalty program.
Alliances. United is a member of Star Alliance, a global integrated airline network and the largest and most comprehensive airline alliance in the world. As of January 1, 2020, Star Alliance carriers served nearly 1,300 airports in 195 countries with more than 19,000 daily departures. Star Alliance members, in addition to United, are Aegean Airlines, Air Canada, Air China, Air India, Air New Zealand, All Nippon Airways ("ANA"), Asiana Airlines, Austrian Airlines, Aerovías del Continente Americano S.A. ("Avianca"), Brussels Airlines, Copa Airlines ("Copa"), Croatia Airlines, EGYPTAIR, Ethiopian Airlines, EVA Air, LOT Polish Airlines, Lufthansa, SAS Scandinavian Airlines, Shenzhen Airlines, Singapore Airlines, South African Airways, SWISS, TAP Air Portugal, THAI Airways International and Turkish Airlines. In addition to its members, Star Alliance includes Shanghai-based Juneyao Airlines as a connecting partner.
United has a variety of bilateral commercial alliance agreements and obligations with Star Alliance members, addressing, among other things, reciprocal earning and redemption of frequent flyer miles, access to airport lounges and, with certain Star Alliance members, codesharing of flight operations (whereby one carrier's selected flights can be marketed under the brand name of another carrier). In addition to the alliance agreements with Star Alliance members, United currently maintains independent marketing alliance agreements with other air carriers, including Aeromar, Aer Lingus, Air Dolomiti, Azul Linhas Aéreas Brasileiras S.A. ("Azul"), Boutique Air, Cape Air, Edelweiss, Eurowings, Hawaiian Airlines, Olympic Air, Silver Airways and Vistara. In addition to the marketing alliance agreements with air partners, United also offers a train-to-plane codeshare and frequent flyer alliance with Amtrak from Newark on select city pairs in the northeastern United States.
United also participates in four passenger joint business arrangements ("JBAs"): one with Air Canada and the Lufthansa Group (which includes Lufthansa and its affiliates Austrian Airlines, Brussels Airlines, Eurowings and SWISS) covering transatlantic routes, one with ANA covering certain transpacific routes, one with Air New Zealand covering certain routes between the United States and New Zealand and one with Avianca and Copa Airlines, which, upon receipt of regulatory approvals will cover routes between the United States and Central and South America, excluding Brazil. These passenger JBAs enable the participating carriers to integrate the services they provide in the respective regions, capturing revenue synergies and delivering enhanced customer benefits, such as highly competitive flight schedules, fares and services. United also participates in cargo JBAs with ANA for transpacific cargo services and with Lufthansa for transatlantic cargo services. These cargo JBAs offer expanded and more seamless access to cargo space across the carriers' respective combined networks.
Loyalty Program. United's MileagePlus loyalty program builds customer loyalty by offering awards, benefits and services to program participants. Members in this program earn miles for flights on United, United Express, Star Alliance members and certain other airlines that participate in the program. Members can also earn miles by purchasing goods and services from our network of non-airline partners, such as domestic and international credit card issuers, retail merchants, hotels and car rental companies. Members can redeem miles for free (other than taxes and government-imposed fees), discounted or upgraded travel and non-travel awards.
United has an agreement with JPMorgan Chase Bank, N.A. ("Chase"), pursuant to which members of United's MileagePlus loyalty program who are residents of the United States can earn miles for making purchases using a MileagePlus credit card issued by Chase (the "Co-Brand Agreement"). The Co-Brand Agreement also provides for joint marketing and other support for the MileagePlus credit card and provides Chase with other benefits such as permission to market to the Company's customer database.
In 2019, approximately 6.1 million MileagePlus flight awards were used on United and United Express. These awards represented 7.2% of United's total revenue passenger miles. Total miles redeemed for flights on United and United Express, including class-of-service upgrades, represented approximately 87% of the total miles redeemed. In addition, excluding miles redeemed for flights on United and United Express, MileagePlus members redeemed miles for approximately 2.2 million other awards. These awards include United Club memberships, car and hotel awards, merchandise and flights on other air carriers.

4



Aircraft Fuel. The table below summarizes UAL's aircraft fuel consumption and expense during the last three years.
Year
 
Gallons Consumed
(in millions)
 
Fuel Expense
(in millions)
 
Average Price Per Gallon
 
Percentage of Total Operating Expense
2019
 
4,292

 
$
8,953

 
$
2.09

 
23
%
2018
 
4,137

 
$
9,307

 
$
2.25

 
24
%
2017
 
3,978

 
$
6,913

 
$
1.74

 
20
%
Our operational and financial results can be significantly impacted by changes in the price and availability of aircraft fuel. To provide adequate supplies of fuel, the Company routinely enters into purchase contracts that are customarily indexed to market prices for aircraft fuel, and the Company generally has some ability to cover short-term fuel supply and infrastructure disruptions at certain major demand locations. The price of aircraft fuel has fluctuated substantially in the past several years. The Company's current strategy is to not enter into transactions to hedge its fuel consumption, although the Company regularly reviews its strategy based on market conditions and other factors.
Third-Party Business. United generates third-party business revenue that includes maintenance services, catering, frequent flyer award non-travel redemptions and ground handling. Third-party business revenue is recorded in Other operating revenue. Expenses associated with third-party business, except non-travel redemptions, are recorded in Other operating expenses. Non-travel redemptions expenses are recorded to Other operating revenue.
Distribution Channels. The Company's airline seat inventory and fares are distributed through the Company's direct channels, traditional travel agencies and on-line travel agencies. The use of the Company's direct sales website, www.united.com, the Company's mobile applications and alternative distribution systems provides the Company with an opportunity to de-commoditize its services, better present its content, make more targeted offerings, better retain its customers, enhance its brand and lower its ticket distribution costs. Agency sales are primarily sold using global distribution systems ("GDS"). United has developed and expects to continue to develop capabilities to sell certain ancillary products through the GDS channel to provide an enhanced buying experience for customers who purchase in that channel.
Industry Conditions
Domestic Competition. The domestic airline industry is highly competitive and dynamic. The Company's competitors consist primarily of other airlines and, to a certain extent, other forms of transportation. Currently, any U.S. carrier deemed fit by the U.S. Department of Transportation (the "DOT") is largely free to operate scheduled passenger service between any two points within the United States. Competition can be direct, in the form of another carrier flying the exact non-stop route, or indirect, where a carrier serves the same two cities non-stop from an alternative airport in that city or via an itinerary requiring a connection at another airport. Air carriers' cost structures are not uniform and are influenced by numerous factors. Carriers with lower costs may offer lower fares to passengers, which could have a potential negative impact on the Company's revenues. Domestic pricing decisions are impacted by intense competitive pressure exerted on the Company by other U.S. airlines. In order to remain competitive and maintain passenger traffic levels, we often find it necessary to match competitors' discounted fares. Since we compete in a dynamic marketplace, attempts to generate additional revenue through increased fares often fail.
International Competition. Internationally, the Company competes not only with U.S. airlines, but also with foreign carriers. International competition has increased and may continue to increase in the future as a result of airline mergers and acquisitions, JBAs, alliances, restructurings, liberalization of aviation bilateral agreements and new or increased service by competitors, including government subsidized competitors from certain Middle East countries. Competition on international routes is subject to varying degrees of governmental regulation. The Company's ability to compete successfully with non-U.S. carriers on international routes depends in part on its ability to generate traffic to and from the entire United States via its integrated domestic route network and its ability to overcome business and operational challenges across its network worldwide. Foreign carriers currently are prohibited by U.S. law from carrying local passengers between two points in the United States and the Company generally experiences comparable restrictions in foreign countries. Separately, "fifth freedom rights" allow the Company to operate between points in two different foreign countries and foreign carriers may also have fifth freedom rights between the U.S. and another foreign country. In the absence of fifth freedom rights, or some other extra-bilateral right to conduct operations between two foreign countries, U.S. carriers are constrained from carrying passengers to points beyond designated international gateway cities. To compensate partially for these structural limitations, U.S. and foreign carriers have entered into alliances, immunized JBAs and marketing arrangements that enable these carriers to exchange traffic between each other's flights and route networks. See Alliances, above, for additional information.

5


Seasonality. The air travel business is subject to seasonal fluctuations. Historically, demand for air travel is higher in the second and third quarters, driving higher revenues, than in the first and fourth quarters, which are periods of lower travel demand.
Industry Regulation
Domestic Regulation. All carriers engaged in air transportation in the United States are subject to regulation by the DOT. Absent an exemption, no air carrier may provide air transportation of passengers or property without first being issued a DOT certificate of public convenience and necessity. The DOT also grants international route authority, approves international codeshare arrangements and regulates methods of competition. The DOT regulates consumer protection and maintains jurisdiction over advertising, denied boarding compensation, tarmac delays, baggage liability and other areas and may add additional expensive regulatory burdens in the future. The DOT has launched investigations or claimed rulemaking authority to regulate commercial agreements among carriers or between carriers and third parties in a wide variety of contexts.
Airlines are also regulated by the Federal Aviation Administration (the "FAA"), an agency within the DOT, primarily in the areas of flight safety, air carrier operations and aircraft maintenance and airworthiness. The FAA issues air carrier operating certificates and aircraft airworthiness certificates, prescribes maintenance procedures, oversees airport operations, and regulates pilot and other employee training. From time to time, the FAA issues directives that require air carriers to inspect, modify or ground aircraft and other equipment, potentially causing the Company to incur substantial, unplanned expenses. The airline industry is also subject to numerous other federal laws and regulations. The U.S. Department of Homeland Security ("DHS") has jurisdiction over virtually every aspect of civil aviation security. The Antitrust Division of the U.S. Department of Justice ("DOJ") has jurisdiction over certain airline competition matters. The U.S. Postal Service has authority over certain aspects of the transportation of mail by airlines. Labor relations in the airline industry are generally governed by the Railway Labor Act ("RLA"), a federal statute. The Company is also subject to investigation inquiries by the DOT, FAA, DOJ, DHS, the U.S. Food and Drug Administration ("FDA"), the U.S. Department of Agriculture ("USDA") and other U.S. and international regulatory bodies.
Airport Access. Access to landing and take-off rights, or "slots," at several major U.S. airports served by the Company are subject to government regulation. Federally-mandated domestic slot restrictions that limit operations and regulate capacity currently apply at three airports: Reagan National Airport in Washington, D.C. ("Reagan National"), John F. Kennedy International Airport and LaGuardia Airport ("LaGuardia") in the New York City metropolitan region. Of these three airports, United currently operates at two: Reagan National and LaGuardia. Additional restrictions on takeoff and landing slots at these and other airports may be implemented in the future and could affect the Company's rights of ownership and transfer as well as its operations.
Legislation. The airline industry is subject to legislative actions (or inactions) that may have an impact on operations and costs. In 2018, the U.S. Congress approved a five-year reauthorization for the FAA, which encompasses significant aviation tax and policy-related issues. The law includes a range of policy changes related to airline customer service and aviation safety which are ongoing and, depending on how they are implemented, could impact our operations and costs. Additionally, the U.S. Congress may consider legislation related to aviation safety as well as environmental issues which could impact the Company and the airline industry.
Catering Operations. The Company owns and operates catering kitchens at airports in Denver, Cleveland, Newark, Houston, and Honolulu, which prepare ready-to-eat food for United flights. Some of the Company's kitchens also prepare ready-to-eat food for other domestic and international airlines. The Company's onboard food service operations are subject to FDA regulation through its interstate conveyance sanitation regulations, and the Company's catering operations are subject to regulation by the FDA and the USDA, as well as other federal, state, and local regulatory agencies. In particular, the FDA enforces the Federal Food Safety Modernization Act which requires all food manufacturers, including ready-to-eat catering operations, to implement stringent risk-based preventive controls. As a result, the Company's catering and food service operations are periodically subject to inspections and enforcement by regulatory agencies.
International Regulation. International air transportation is subject to extensive government regulation. In connection with the Company's international services, the Company is regulated by both the U.S. government and the governments of the foreign countries the Company serves. In addition, the availability of international routes to U.S. carriers is regulated by aviation agreements between the U.S. and foreign governments, and in some cases, fares and schedules require the approval of the DOT and/or the relevant foreign governments.
Legislation. Foreign countries are increasingly enacting passenger protection laws, rules and regulations that meet or exceed U.S. requirements. In cases where this activity exceeds U.S. requirements, additional burden and liability may be placed on the Company. Certain countries have regulations requiring passenger compensation and/or enforcement penalties from the Company in addition to changes in operating procedures due to canceled and delayed flights.

6


Airport Access. Historically, access to foreign markets has been tightly controlled through bilateral agreements between the U.S. and each foreign country involved. These agreements regulate the markets served, the number of carriers allowed to serve each market and the frequency of carriers' flights. Since the early 1990s, the U.S. has pursued a policy of "Open Skies" (meaning all U.S.-flag carriers have access to the destination), under which the U.S. government has negotiated a number of bilateral agreements allowing unrestricted access between U.S. and foreign markets. Currently, there are more than 100 Open Skies agreements in effect. However, even with Open Skies, many of the airports that the Company serves in Europe, Asia and Latin America maintain slot controls. A large number of these slot controls exist due to congestion, environmental and noise protection and reduced capacity due to runway and air traffic control ("ATC") construction work, among other reasons. London Heathrow International Airport, Frankfurt Rhein-Main Airport, Shanghai Pudong International Airport, Beijing Capital International Airport, Sao Paulo Guarulhos International Airport and Tokyo Haneda International Airport are among the most restrictive foreign airports due to slot and capacity limitations.
The Company's ability to serve some foreign markets and expand into certain others is limited by the absence of aviation agreements between the U.S. government and the relevant foreign governments. Shifts in U.S. or foreign government aviation policies may lead to the alteration or termination of air service agreements. Depending on the nature of any such change, the value of the Company's international route authorities and slot rights may be materially enhanced or diminished. Similarly, foreign governments control their airspace and can restrict our ability to overfly their territory, enhancing or diminishing the value of the Company's existing international route authorities and slot rights.
Environmental Regulation. The airline industry is subject to increasingly stringent federal, state, local and international environmental requirements, including those regulating emissions to air, water discharges, safe drinking water and the use and management of hazardous substances and wastes.
Climate Change. There is an increasing global regulatory focus on greenhouse gas ("GHG") emissions and their potential impacts relating to climate change. An initiative to regulate GHG emissions from aviation known as the European Union ("EU") Emission Trading System ("ETS") was adopted in 2009, but applicability to flights arriving or departing from airports outside the EU has been postponed several times. In December 2017, the European Parliament voted to extend exemptions for extra-EU flights until December 2023 in order to align the extension date with the completion of the pilot phase of the International Civil Aviation Organization's ("ICAO") Carbon Offsetting and Reduction Scheme for International Aviation ("CORSIA"). CORSIA, which was adopted in October 2016, is intended to create a single global market-based measure to achieve carbon-neutral growth for international aviation after 2020, which can be achieved through airline purchases of carbon offset credits. However, the European Parliament is expected to assess CORSIA implementation and re-assess the applicability of EU ETS to international aviation in 2024, at which point the EU could require all extra- and intra-EU flights to participate in EU ETS. Certain CORSIA program details remain to be developed and could potentially be affected by political developments in participating countries or the results of the pilot phase of the program, and thus the impact of CORSIA cannot be fully predicted. However, CORSIA is expected to increase operating costs for the Company, depending on a number of factors, including the number of its flights that are subject to CORSIA, the fuel efficiency of the Company's fleet, the Company's purchase and use of CORSIA-eligible sustainable aviation fuels, aviation sector growth, and the price of CORSIA-eligible offsets. In 2017, ICAO also adopted a carbon dioxide ("CO2") emission standard for aircraft. In 2016, the U.S. Environmental Protection Agency ("EPA") commenced procedural steps necessary to adopt its own standard, but has not yet taken further action. While the precise timing and final form of these various programs and requirements continue to evolve, the Company is taking various actions that are expected to help reduce its CO2 emissions over time such as improving fuel efficiency, fleet renewal, aircraft retrofits and promoting the commercialization of sustainable aviation fuels.
Other Regulations. Our operations are subject to a variety of other environmental laws and regulations both in the United States and internationally. These include noise-related restrictions on aircraft types and operating times and state and local air quality initiatives which have, or could in the future, result in curtailments in services, increased operating costs, limits on expansion, or further emission reduction requirements. Certain airports and/or governments, both domestically and internationally, either have or are seeking to establish environmental fees and other requirements applicable to carbon emissions, local air quality pollutants and/or noise. The implementation of these requirements is expected to result in restrictions on mobile sources such as cars, trucks and airport ground support equipment in corresponding locations. Finally, environmental cleanup laws could require the Company to undertake or subject the Company to liability for investigation and remediation costs at certain owned or leased locations or third-party disposal locations.
Until applicability of new regulations to our specific operations is better defined and/or until pending regulations are finalized, future costs to comply with such regulations will remain uncertain but are likely to increase our operating costs over time. While we continue to monitor these developments, the precise nature of future requirements and their applicability to the Company are difficult to predict, but the financial impact to the Company and the aviation industry could be significant.

7


Employees
As of December 31, 2019, UAL, including its subsidiaries, had approximately 96,000 employees. Approximately 84% of the Company's employees were represented by various U.S. labor organizations.
Collective bargaining agreements between the Company and its represented employee groups are negotiated under the RLA. Such agreements typically do not contain an expiration date and instead specify an amendable date, upon which the agreement is considered "open for amendment."
On February 1, 2019, the collective bargaining agreement with the Air Line Pilots Association ("ALPA"), the labor union representing United's pilots, became amendable. The Company and ALPA are in negotiations for an amended agreement. The Company and UNITE HERE, the labor union representing United's Catering employees, started negotiations for a first collective bargaining agreement in March 2019.
The following table reflects the Company's represented employee groups, the number of employees per represented group, union representation for each employee group, and the amendable date for each employee group's collective bargaining agreement as of December 31, 2019:    
Employee
Group
 
Number of Employees
 
Union
 
Agreement Open for Amendment
Flight Attendants
 
24,203

 
Association of Flight Attendants (the "AFA")
 
August 2021
Fleet Service
 
13,803

 
International Association of Machinists and Aerospace Workers (the "IAM")
 
December 2021
Passenger Service
 
12,135

 
IAM
 
December 2021
Pilots
 
12,251

 
ALPA
 
January 2019
Technicians
 
9,318

 
International Brotherhood of Teamsters (the "IBT")
 
December 2022 (a)
Passenger Service - United Ground Express, Inc.
 
4,155

 
IAM
 
March 2025
Catering
 
2,577

 
UNITE HERE
 
N/A
Storekeepers
 
989

 
IAM
 
December 2021
Dispatchers
 
412

 
Professional Airline Flight Control Association
 
December 2021
Fleet Tech Instructors
 
130

 
IAM
 
December 2021
Load Planners
 
62

 
IAM
 
December 2021
Security Officers
 
45

 
IAM
 
December 2021
Maintenance Instructors
 
40

 
IAM
 
December 2021
(a) The collective bargaining agreement with the IBT contains provisions that require the Company to align contract terms with other airlines' workgroups under certain conditions.
Information about Our Executive Officers
Kate Gebo. Age 51. Ms. Gebo has served as Executive Vice President Human Resources and Labor Relations of UAL and United since December 2017. From November 2016 to November 2017, Ms. Gebo served as Senior Vice President, Global Customer Service Delivery and Chief Customer Officer of United. From October 2015 to November 2016, Ms. Gebo served as Vice President of the Office of the Chief Executive Officer. From November 2009 to October 2015, Ms. Gebo served as Vice President of Corporate Real Estate of United.
Brett J. Hart. Age 50. Mr. Hart has served as Executive Vice President and Chief Administrative Officer of UAL and United since March 2019. From May 2017 to March 2019, he served as Executive Vice President, Chief Administrative Officer and General Counsel of UAL and United. From February 2012 to May 2017, he served as Executive Vice President and General Counsel of UAL and United. Mr. Hart served as acting Chief Executive Officer and principal executive officer of the Company, on an interim basis, from October 2015 to March 2016. From December 2010 to February 2012, he served as Senior Vice President, General Counsel and Secretary of UAL, United and Continental Airlines, Inc. ("Continental"). From June 2009 to December 2010, Mr. Hart served as Executive Vice President, General Counsel and Corporate Secretary at Sara Lee Corporation, a consumer food and beverage company. From March 2005 to May 2009, Mr. Hart served as Deputy General Counsel and Chief Global Compliance Officer of Sara Lee Corporation.
Gregory L. Hart. Age 54. Mr. Hart has served as Executive Vice President and Chief Operations Officer of UAL and United since February 2014. From December 2013 to February 2014, he served as Senior Vice President Operations of UAL and United. From September 2012 to December 2013, Mr. Hart served as Senior Vice President Technical Operations of United. From October 2010 to September 2012, Mr. Hart served as Senior Vice President Network of United and Continental. From

8


September 2008 to September 2010, Mr. Hart served as Vice President Network Strategy of Continental. Mr. Hart joined Continental in 1997.
Linda P. Jojo. Age 54. Ms. Jojo has served as Executive Vice President Technology and Chief Digital Officer of UAL and United since May 2017. From November 2014 to May 2017, Ms. Jojo served as Executive Vice President and Chief Information Officer of UAL and United. From July 2011 to October 2014, Ms. Jojo served as Executive Vice President and Chief Information Officer of Rogers Communications, Inc., a Canadian communications and media company. From October 2008 to June 2011, Ms. Jojo served as Chief Information Officer of Energy Future Holdings, a Dallas-based privately held energy company and electrical utility provider.
Chris Kenny. Age 55. Mr. Kenny has served as Vice President and Controller of UAL and United since October 2010. From September 2003 to September 2010, Mr. Kenny served as Vice President and Controller of Continental. Mr. Kenny joined Continental in 1997.
J. Scott Kirby. Age 52. Mr. Kirby has served as President of UAL and United since August 2016. Prior to joining the Company, from December 2013 to August 2016, Mr. Kirby served as President of American Airlines Group and American Airlines, Inc. Mr. Kirby also previously served as President of US Airways from October 2006 to December 2013. Mr. Kirby held significant other leadership roles at US Airways and at America West prior to the 2005 merger of those carriers, including Executive Vice President—Sales and Marketing (2001 to 2006); Senior Vice President, e-business (2000 to 2001); Vice President, Revenue Management (1998 to 2000); Vice President, Planning (1997 to 1998); and Senior Director, Scheduling and Planning (1995 to 1998). Prior to joining America West, Mr. Kirby worked for American Airlines Decision Technologies and at the Pentagon.
In December 2019, the Company announced that Mr. Kirby will become Chief Executive Officer of UAL and United following UAL's 2020 Annual Meeting of Stockholders, scheduled for May 20, 2020 (the "2020 Annual Meeting").
Gerald Laderman. Age 62. Mr. Laderman has served as Executive Vice President and Chief Financial Officer since August 2018. Mr. Laderman served as Senior Vice President Finance, Procurement and Treasurer for UAL and United from 2013 to August 2015, and again from August 2016 to May 2018. Mr. Laderman additionally was acting Chief Financial Officer from August 2015 to August 2016 and from May 2018 to August 2018. Mr. Laderman served as Senior Vice President Finance and Treasurer for the Company from 2010 to 2013. From 2001 to 2010, Mr. Laderman served as Senior Vice President of Finance and Treasurer for Continental. Mr. Laderman joined Continental in 1988 as senior director legal affairs, finance and aircraft programs.
Oscar Munoz. Age 61. Mr. Munoz has served as Chief Executive Officer of UAL and United since September 2015, and also as President of UAL and United from September 2015 until August 2016. From February 2015 to September 2015, Mr. Munoz served as President and Chief Operating Officer of CSX Corporation ("CSX"), a railroad and intermodal transportation services company, overseeing operations, sales and marketing, human resources, service design and information technology. Prior to his appointment as President and Chief Operating Officer of CSX, Mr. Munoz served as Executive Vice President and Chief Operating Officer of CSX from January 2012 to February 2015 and as Executive Vice President and Chief Financial Officer of CSX from 2003 to 2012. Mr. Munoz has been a member of the UAL Board of Directors since 2010.
In December 2019, the Company announced that Mr. Munoz will transition from the role of Chief Executive Officer of UAL and United following UAL's 2020 Annual Meeting and assume the role of Executive Chairman of the Board of Directors of UAL.
Andrew Nocella. Age 50. Mr. Nocella has served as Executive Vice President and Chief Commercial Officer of UAL and United since September 2017. From February 2017 to September 2017, he served as Executive Vice President and Chief Revenue Officer of UAL and United. Prior to joining the Company, from August 2016 to February 2017, Mr. Nocella served as Senior Vice President, Alliances and Sales of American Airlines, Inc. From December 2013 to August 2016, he served as Senior Vice President and Chief Marketing Officer of American Airlines, Inc. From August 2007 to December 2013, he served as Senior Vice President, Marketing and Planning of US Airways.

9


ITEM 1A.
RISK FACTORS.
The following risk factors should be read carefully when evaluating the Company's business and the forward-looking statements contained in this report and other statements the Company or its representatives make from time to time. Any of the following risks could materially and adversely affect the Company's business, operating results, financial condition and the actual outcome of matters as to which forward-looking statements are made in this report.
If we do not successfully execute our strategic operating plan, or if our strategic operating plan is unsuccessful, our business, operating results and financial condition could be materially and adversely affected.
We have announced several strategic plans in recent years, including several revenue-generating initiatives and plans to optimize our revenue, such as our plans to add capacity, including international expansion and new or increased service to mid-size airports, and initiatives and plans to optimize and control our costs. We also continue to explore opportunities to enhance our segmentation, including the introduction of Polaris, Basic Economy and United Premium Plus, and are implementing many programs and policies to improve the customer experience at all points in air travel. In developing our strategic operating plan, we make certain assumptions, including, but not limited to, those related to customer demand, competition, market consolidation, the availability of aircraft and the global economy. Actual economic, market and other conditions may be different from our assumptions. In 2019, our capacity growth was lower than planned due to the grounding of Boeing 737 MAX aircraft, among other factors, which adversely impacted our ability to execute our strategic operating plans. If we do not successfully execute our strategic operating plan, or if actual results vary significantly from our assumptions, our business, operating results and financial condition could be materially and adversely impacted.
Unfavorable economic and political conditions, in the United States and globally, may have a material adverse effect on our business, operating results and financial condition.
The Company's business and operating results are significantly impacted by U.S. and global economic and political conditions. The airline industry is highly cyclical, and the level of demand for air travel is correlated to the strength of the U.S. and global economies. Robust demand for the Company's air transportation services depends largely on favorable economic conditions, including the strength of the domestic and foreign economies, low unemployment levels, strong consumer confidence levels and the availability of consumer and business credit. Air transportation is often a discretionary purchase that leisure travelers may limit or eliminate during difficult economic times. Short-haul travelers, in particular, have the option to replace air travel with surface travel. In addition, during periods of unfavorable economic conditions, business travelers historically have reduced the volume of their travel, either due to cost-saving initiatives, the replacement of travel with alternatives such as videoconferencing, or as a result of decreased business activity requiring travel. During such periods, the Company's business and operating results may be adversely affected due to significant declines in industry passenger demand, particularly with respect to the Company's business and premium cabin travelers, and a reduction in fare levels.
As a global business with operations outside of the United States from which it derives significant operating revenues, volatile conditions in certain international regions may have a negative impact on the Company's operating results and its ability to achieve its business objectives. The Company's international operations are a vital part of its worldwide airline network. Political disruptions and instability in certain regions can negatively impact the demand and network availability for air travel. Additionally, any deterioration in global trade relations, such as increased tariffs or other trade barriers, could result in a decrease in the demand for international air travel.
Stagnant or weakening global economic conditions either in the United States or in other geographic regions may have a material adverse effect on the Company's revenues, operating results and liquidity.
The global airline industry is highly competitive and susceptible to price discounting and changes in capacity, which could have a material adverse effect on our business, operating results and financial condition.
The airline industry is highly competitive, marked by significant competition with respect to routes, fares, schedules (both timing and frequency), services, products, customer service and frequent flyer programs. Consolidation in the airline industry, the rise of well-funded government sponsored international carriers, changes in international alliances and the creation of immunized JBAs have altered and are expected to continue to alter the competitive landscape in the industry, resulting in the formation of airlines and alliances with increased financial resources, more extensive global networks and services and competitive cost structures.
Airlines also compete by increasing or decreasing their capacity, including route systems and the number of destinations served. Several of the Company's domestic and international competitors have increased their international capacity by including service to some destinations that the Company currently serves, causing overlap in destinations served, and therefore, increasing competition for those destinations. This increased competition in both domestic and international markets may have

10


a material adverse effect on the Company's business, operating results and financial condition.
The Company's U.S. operations are subject to competition from traditional network carriers, national point-to-point carriers, and discount carriers, including low-cost carriers and ultra-low-cost carriers. Such carriers may have lower costs and provide service at lower fares to destinations also served by the Company. The significant presence of low-cost carriers and ultra-low-cost carriers, which engage in substantial price discounting, may diminish our ability to achieve sustained profitability on domestic and international routes. Our ability to compete in the domestic market effectively depends, in part, on our ability to maintain a competitive cost structure. If we cannot maintain our costs at a competitive level, then our business, operating results and financial condition could be materially and adversely affected.
Our international operations are subject to competition from both foreign and domestic carriers. Competition is significant from government subsidized competitors from certain Middle East countries. These carriers have large numbers of international widebody aircraft on order and are increasing service to the U.S. from their hubs in the Middle East. The government support provided to these carriers has allowed them to grow quickly, reinvest in their product, invest in other airlines and expand their global presence. We also face competition from foreign carriers operating under "fifth freedom" rights permitted under international treaties that allow certain carriers to provide service to and from stopover points between their home country and ultimate destination, including points in the United States, in competition with service provided by us.
Through alliance and other marketing and codesharing agreements with foreign carriers, U.S. carriers have increased their ability to sell international transportation, such as services to and beyond traditional global gateway cities. Similarly, foreign carriers have obtained increased access to interior U.S. passenger traffic beyond traditional U.S. gateway cities through these relationships. In addition, several JBAs among U.S. and foreign carriers have received grants of antitrust immunity allowing the participating carriers to coordinate schedules, pricing, sales and inventory. If we are not able to continue participating in these types of alliance and other marketing and codesharing agreements in the future, our business, operating results and financial condition could be materially and adversely affected.
High and/or volatile fuel prices or significant disruptions in the supply of aircraft fuel could have a material adverse impact on the Company's strategic plans, operating results, financial condition and liquidity.
Aircraft fuel is critical to the Company's operations and is one of our largest operating expenses. During the year ended December 31, 2019, the Company's fuel expense was approximately $9.0 billion. The timely and adequate supply of fuel to meet operational demand depends on the continued availability of reliable fuel supply sources, as well as related service and delivery infrastructure. Although the Company has some ability to cover short-term fuel supply and infrastructure disruptions at some major demand locations, it depends significantly on the continued performance of its vendors and service providers to maintain supply integrity. Consequently, the Company can neither predict nor guarantee the continued timely availability of aircraft fuel throughout the Company's system.
Aircraft fuel has historically been the Company's most volatile operating expense due to the highly unpredictable nature of market prices for fuel. The Company generally sources fuel at prevailing market prices. Market prices for aircraft fuel have historically fluctuated substantially in short periods of time and continue to be highly volatile due to a dependence on a multitude of unpredictable factors beyond the Company's control. These factors include changes in global crude oil prices, the balance between aircraft fuel supply and demand, natural disasters, prevailing inventory levels and fuel production and transportation infrastructure. Prices of fuel are also impacted by indirect factors, such as geopolitical events, economic growth indicators, fiscal/monetary policies, fuel tax policies, changes in regulations, environmental concerns and financial investments in energy markets. Both actual changes in these factors, as well as changes in related market expectations, can potentially drive rapid changes in fuel prices in short periods of time.
Given the highly competitive nature of the airline industry, the Company may not be able to increase its fares and fees sufficiently to offset the full impact of increases in fuel prices, especially if these increases are significant, rapid and sustained. Further, any such fare or fee increase may not be sustainable, may reduce the general demand for air travel and may also eventually impact the Company's strategic growth and investment plans for the future. In addition, decreases in fuel prices for an extended period of time may result in increased industry capacity, increased competitive actions for market share and lower fares or surcharges. If fuel prices were to then subsequently rise quickly, there may be a lag between the rise in fuel prices and any improvement of the revenue environment.
To protect against increases in the market prices of fuel, the Company may hedge a portion of its future fuel requirements. The Company does not currently hedge its future fuel requirements. However, to the extent the Company decides to start a hedging program, such hedging program may not be successful in mitigating higher fuel costs, and any price protection provided may be limited due to the choice of hedging instruments and market conditions, including breakdown of correlation between hedging instrument and market price of aircraft fuel and failure of hedge counterparties. To the extent that the Company decides to hedge a portion of its future fuel requirements and uses hedge contracts that have the potential to create an obligation

11


to pay upon settlement if fuel prices decline significantly, such hedge contracts may limit the Company's ability to benefit fully from lower fuel prices in the future. If fuel prices decline significantly from the levels existing at the time the Company enters into a hedge contract, the Company may be required to post collateral (margin) beyond certain thresholds. There can be no assurance that the Company's hedging arrangements, if any, will provide any particular level of protection against rises in fuel prices or that its counterparties will be able to perform under the Company's hedging arrangements. Additionally, deterioration in the Company's financial condition could negatively affect its ability to enter into new hedge contracts in the future.
The Company relies heavily on technology and automated systems to operate its business and any significant failure or disruption of the technology or these systems could materially harm its business.
The Company depends on automated systems and technology to operate its business, including, but not limited to, computerized airline reservation systems, demand prediction software, flight operations systems, revenue management systems, accounting systems, technical and business operations systems, telecommunication systems and commercial websites and applications, including www.united.com and the United Airlines app. United's website and other automated systems must be able to accommodate a high volume of traffic, maintain secure information and deliver important flight and schedule information, as well as process critical financial transactions. These systems could suffer substantial or repeated disruptions due to various events, some of which are beyond the Company's control, including natural disasters, power failures, terrorist attacks, equipment or software failures or cyber security attacks. We have initiatives in place to prevent disruptions and disaster recovery plans, and we continue to invest in improvements to these initiatives and plans; however, these measures may not be adequate to prevent or mitigate disruptions. Substantial or repeated systems failures or disruptions, including failures or disruptions related to the Company's complex integration of systems, could reduce the attractiveness of the Company's services versus those of its competitors, materially impair its ability to market its services and operate its flights, result in the unauthorized release of confidential or otherwise protected information, result in increased costs, lost revenue and the loss or compromise of important data, and may adversely affect the Company's business, operating results and financial condition.
The Company's business relies extensively on third-party service providers, including certain technology providers. Failure of these parties to perform as expected, or interruptions in the Company's relationships with these providers or their provision of services to the Company, could have a material adverse effect on the Company's business, operating results and financial condition.
The Company has engaged third-party service providers to perform a large number of functions that are integral to its business, including regional operations, operation of customer service call centers, distribution and sale of airline seat inventory, provision of information technology infrastructure and services, transmitting or uploading of data, provision of aircraft maintenance and repairs, provision of various utilities, performance of aircraft fueling operations and catering services, among other vital functions and services. The Company does not directly control these third-party service providers, although generally it does enter into agreements that define expected service performance and compliance requirements, such as compliance with legal requirements, including anti-corruption laws; however, there can be no assurance that our third-party service providers will adhere to these requirements.
Any of these third-party service providers, however, may materially fail to meet its service performance commitments to the Company or may suffer disruptions to its systems that could impact its services. For example, failures in certain third-party technology or communications systems may cause flight delays or cancellations. The failure of any of the Company's third-party service providers to perform its service obligations adequately, or other interruptions of services, may reduce the Company's revenues and increase its expenses, prevent the Company from operating its flights and providing other services to its customers or result in adverse publicity or harm to our brand. We may also be subject to consequences from any illegal conduct of our third-party service providers, including for their failure to comply with anti-corruption laws, such as the U.S. Foreign Corrupt Practices Act. In addition, the Company's business and financial performance could be materially harmed if its customers believe that its services are unreliable or unsatisfactory.
The Company may also have disagreements with such providers or such contracts may be terminated or may not be extended or renewed. For example, the number of flight reservations booked through third-party GDSs or online travel agents ("OTAs") may be adversely affected by disruptions in the business relationships between the Company and these suppliers. Such disruptions, including a failure to agree upon acceptable contract terms when contracts expire or otherwise become subject to renegotiation, may cause the Company's flight information to be limited or unavailable for display by the affected GDS or OTA operator, significantly increase fees for both the Company and GDS/OTA users and impair the Company's relationships with its customers and travel agencies. Any such disruptions or contract terminations may adversely impact our operations and financial results.
If we are not able to negotiate or renew agreements with third-party service providers, or if we renew existing agreements on less favorable terms, our operations and financial results may be adversely affected.

12


The Company could experience adverse publicity, harm to its brand, reduced travel demand and potential tort liability as a result of an accident, catastrophe or incident involving its aircraft or its operations, the aircraft or operations of its regional carriers, the aircraft or operations of its codeshare partners, or the aircraft or operations of another airline, which may result in a material adverse effect on the Company's business, operating results and financial condition.
An accident, catastrophe or incident involving an aircraft that the Company operates, or an aircraft that is operated by a codeshare partner, one of the Company's regional carriers or another airline, or an incident involving the Company's operations, or the operations of a codeshare partner, one of the Company's regional carriers or of another airline, could have a material adverse effect on the Company if such accident, catastrophe or incident created a public perception that the Company's operations, or the operations of its codeshare partners or regional carriers, are not safe or reliable, or are less safe or reliable than other airlines. Additionally, any accident, catastrophe or incident involving an aircraft type that is operated by the Company, its codeshare partners or regional carriers could have a material adverse effect on the Company if such accident, catastrophe or incident creates a public perception that such aircraft type was not safe or reliable. Such public perception could, in turn, result in adverse publicity for the Company, cause harm to the Company's brand and reduce travel demand on the Company's flights, or the flights of its codeshare partners or regional carriers.
In addition, any such accident, catastrophe or incident involving the Company, its regional carriers or its codeshare partners could expose the Company to significant tort liability. Although the Company currently maintains liability insurance in amounts and of the type the Company believes to be consistent with industry practice to cover damages arising from any such accident, catastrophe or incident, and the Company's codeshare partners and regional carriers carry similar insurance and generally indemnify the Company for their operations, if the Company's liability exceeds the applicable policy limits or the ability of another carrier to indemnify it, the Company could incur substantial losses from an accident, catastrophe or incident which may result in a material adverse effect on the Company's operating results and financial condition.
Terrorist attacks, international hostilities or other security events, or the fear of terrorist attacks or hostilities, even if not made directly on the airline industry, could negatively affect the Company and the airline industry.
Terrorist attacks or international hostilities, even if not made on or targeted directly at the airline industry, or the fear of or the precautions taken in anticipation of such attacks (including elevated national threat warnings, travel restrictions, selective cancellation or redirection of flights and new security regulations) could materially and adversely affect the Company and the airline industry. Security events pose a significant risk to our passenger and cargo operations. These events could include acts of violence in public areas that we cannot control. The Company's financial resources may not be sufficient to absorb the adverse effects of any future terrorist attacks, international hostilities or other security events. Any such events could have a material adverse impact on the Company's financial condition, liquidity and operating results.
Increasing privacy and data security obligations or a significant data breach may adversely affect the Company's business.
In our regular business operations, we collect, transmit, process and store sensitive data, including personal information of our customers and employees such as payment processing information and information of our business partners. The Company depends on the ability to use information we collect to provide our services and operate our business.
The Company must manage increasing legislative, regulatory and consumer focus on privacy issues and data security. For example, in May 2018, the EU's General Data Protection Regulation became effective, which imposes significant privacy and data security requirements, as well as potential for substantial penalties for non-compliance. Recent penalties imposed by regulators have resulted in substantial adverse financial consequences to those companies. Also, some of the Company's commercial partners, such as credit card companies, have imposed data security standards that the Company must meet. These standards continue to evolve. The Company will continue its efforts to meet its privacy and data security obligations; however, it is possible that certain new obligations or customer expectations may be difficult to meet and could increase the Company's costs.
Additionally, the Company must manage evolving cybersecurity risks. Our network systems and storage applications, and those systems and storage and other business applications maintained by our third-party providers, may be subject to attempts to gain unauthorized access, breach, malfeasance or other system disruptions. In some cases, it is difficult to anticipate or to detect immediately such incidents and the damage caused thereby. In addition, as attacks by cybercriminals become more sophisticated, frequent and intense, the costs of proactive defense measures may increase. While we continually work to safeguard our internal network systems, including through risk assessments, system monitoring, information security policies and employee awareness and training, and review and validate our third-party security standards, there is no assurance that such actions will be sufficient to prevent cyber-attacks or data breaches.
The loss, disclosure, misappropriation of or access to customers', employees' or business partners' information or the Company's failure to meet its obligations could result in legal claims or proceedings, penalties and remediation costs. A

13


significant data breach or the Company's failure to meet its obligations may adversely affect the Company's reputation, relationships with our business partners, business, operating results and financial condition.
The mandatory grounding of our Boeing 737 MAX 9 aircraft may have a material adverse effect on our business, operating results and financial condition.
On March 13, 2019, the Federal Aviation Administration issued an emergency order prohibiting the operation of Boeing 737 MAX series aircraft by U.S. certificated operators (the "FAA Order"). As a result, the Company grounded all 14 Boeing 737 MAX 9 aircraft in its fleet and Boeing also suspended deliveries of new Boeing 737 MAX series aircraft. The Company does not know whether, on what conditions or when the MAX grounding will end. The long-term operational and financial impact of this grounding is uncertain and could negatively affect the Company based on a number of factors, including, among others, the period of time the aircraft are unavailable, the availability of replacement aircraft, to the extent needed, and the circumstances of any reintroduction of the grounded aircraft to service.
In 2019, the grounding affected the delivery of 16 Boeing 737 MAX aircraft that were scheduled for delivery and were not delivered, and it is also expected to affect the timing of future Boeing 737 MAX aircraft deliveries, including the 28 Boeing 737 MAX aircraft that the Company planned to take delivery in 2020. The extent of the delay of future deliveries is expected to be impacted by the length of time the FAA Order remains in place, Boeing's production rate and the pace at which Boeing can deliver aircraft following the lifting of the FAA Order, among other factors.
The Company continues to make adjustments to its flight schedule and operations, including substituting replacement aircraft on routes originally intended to be flown by Boeing 737 MAX aircraft. The grounding has impacted the Company's ability to implement its strategic growth strategy, reducing the Company's scheduled capacity from its planned capacity, and has resulted in increased costs as well as lower operating revenue. The Company has had discussions with Boeing regarding compensation from Boeing for the Company's financial damages related to the grounding of the airline's Boeing 737 MAX aircraft; however, the parties have not agreed to any settlement, and the amount, nature and timing of any settlement with Boeing remains uncertain.
Disruptions to our regional network and United Express flights provided by third-party regional carriers could adversely affect our business, operating results and financial condition.
The Company has contractual relationships with various regional carriers to provide regional aircraft service branded as United Express. These regional operations are an extension of the Company's mainline network and complement the Company's operations by carrying traffic that connects to mainline service and allows flights to smaller cities that cannot be provided economically with mainline aircraft. The Company's business and operations are dependent on its regional flight network, with regional capacity accounting for approximately 11% of the Company's total capacity for the year ended December 31, 2019.
Although the Company has agreements with its regional carriers that include contractually agreed performance metrics, each regional carrier is a separately certificated commercial air carrier and the Company does not control the operations of these carriers. A number of factors may impact the Company's regional network, including weather-related effects and seasonality. In addition, the decrease in qualified pilots driven by changes to federal regulations has adversely impacted and could continue to affect the Company's regional flying. For example, the FAA's expansion of minimum pilot qualification standards, including a requirement that a pilot have at least 1,500 total flight hours, as well as the FAA's revised pilot flight and duty time requirements under Part 117 of the Federal Aviation Regulations, have contributed to a smaller supply of pilots available to regional carriers. The decrease in qualified pilots resulting from the regulations as well as factors including a decreased student pilot population and a shrinking U.S. military from which to hire qualified pilots, could adversely impact the Company's operations and financial condition, and could also require the Company to reduce regional carrier flying.
If a significant disruption occurs to the Company's regional network or flights or if one or more of the regional carriers with which the Company has relationships is unable to perform their obligations over an extended period of time, there could be a material adverse effect on the Company's business, operating results and financial condition.
Current or future litigation and regulatory actions, or failure to comply with the terms of any settlement, order or arrangement relating to these actions, could have a material adverse impact on the Company.
From time to time, we are subject to litigation and other legal and regulatory proceedings relating to our business or investigations or other actions by governmental agencies, including as described in Part I, Item 3, Legal Proceedings, of this report. No assurances can be given that the results of these or new matters will be favorable to us. An adverse resolution of lawsuits, arbitrations, investigations or other proceedings or actions could have a material adverse effect on our financial condition and operating results, including as a result of non-monetary remedies, and could also result in adverse publicity. Defending ourselves in these matters may be time-consuming, expensive and disruptive to normal business operations and may

14


result in significant expense and a diversion of management's time and attention from the operation of our business, which could impede our ability to achieve our business objectives. Additionally, any amount that we may be required to pay to satisfy a judgment, settlement, fine or penalty may not be covered by insurance. If we fail to comply with the terms contained in any settlement, order or agreement with a governmental authority relating to these matters, we could be subject to criminal or civil penalties, which could have a material adverse impact on the Company. Under our charter and certain indemnification agreements that we have entered into (and may in the future enter into) with our officers, directors and certain third parties, we could be required to indemnify and advance expenses to them in connection with their involvement in certain actions, suits, investigations and other proceedings. There can be no assurance that any of these payments will not be material.
Our significant investments in other airlines, including in other parts of the world, and the commercial relationships that we have with those carriers may not produce the returns or results we expect.
An important part of our strategy to expand our global network includes making significant investments in airlines both domestically and in other parts of the world and expanding our commercial relationships with these carriers. For example, in January 2019, we completed the acquisition of a 49.9% interest in ManaAir LLC, which, as of immediately following the closing of that investment, owns 100% of the equity interests in ExpressJet Airlines LLC, a domestic regional airline. We also have minority equity interests in CommutAir and Republic Airways Holdings Inc. See Note 9 to the financial statements included in Part II, Item 8 of this report for additional information regarding our investments in regional airlines. We also have significant investments in Latin American airlines, including significant investments in Avianca Holdings, S.A. ("AVH") and BRW Aviation LLC ("BRW"), an affiliate of Synergy Aerospace Corporation and the majority shareholder of AVH, and an equity investment in Azul. See Note 8 and Note 9 to the financial statements included in Part II, Item 8 of this report for additional information regarding our investments in AVH and Azul, respectively. See also the additional risks with respect to our investment in AVH described in this Part I, Item 1A. Risk Factors.
We expect to continue exploring similar non-controlling investments in, and entering into JBAs, commercial agreements, loan transactions and strategic alliances with, other carriers as part of our regional and global business strategy. These transactions and relationships involve significant challenges and risks, and we face competition in forming and maintaining these relationships, since there are a limited number of potential arrangements and other airlines are looking to enter into similar relationships. We are dependent on these other carriers for significant aspects of our network in the regions in which they operate. While we work closely with these carriers, each is a separately certificated commercial air carrier, and we do not have control over their operations, strategy, management or business methods. And not only are these airlines subject to a number of the same risks as our business, which are described elsewhere in this Part I, Item 1A. Risk Factors, including competitive pressures on pricing, demand and capacity, changes in aircraft fuel pricing, and the impact of global and local political and economic conditions on operations and customer travel patterns, among others, they are also subject to their own distinct financial and operational risks.
As a result of these and other factors, we may not realize a satisfactory return on our investment, and we may not receive repayment of any invested or loaned funds. Further, these investments may not generate the revenue or operational synergies we expect, and they may distract management focus from our operations or other strategic options. Finally, our reliance on these other carriers in the regions in which they operate may negatively impact our regional and global operations and results if those carriers are impacted by general business risks or perform below our expectations or needs. Any one or more of these events could have a material adverse effect on our operating results or financial condition.
We may also be subject to consequences from any illegal conduct of JBA partners, including for failure to comply with anti-corruption laws such as the U.S. Foreign Corrupt Practices Act. Furthermore, our relationships with these carriers may be subject to the laws and regulations of non-U.S. jurisdictions in which these carriers are located or conduct business. In addition, any political or regulatory change in these jurisdictions that negatively impacts or prohibits our arrangements with these carriers could have an adverse effect on our operating results or financial condition. To the extent that the operations of any of these carriers are disrupted over an extended period of time or their actions subject us to the consequences of failure to comply with laws and regulations, our operating results may be adversely affected.
Our significant investments in AVH and its affiliates, and the commercial relationships that we have with Avianca may not produce the returns or results we expect.
In November 2018, as part of our global network strategy, United entered into a revenue-sharing JBA with Avianca, a subsidiary of AVH, Copa and several of their respective affiliates, subject to regulatory approval. Concurrently with this transaction, United, as lender, entered into a Term Loan Agreement (the "BRW Term Loan Agreement") with, among others, BRW Aviation Holding LLC ("BRW Holding") and BRW, as guarantor and borrower, respectively. Pursuant to the BRW Term Loan Agreement, United provided to BRW a $456 million term loan (the "BRW Term Loan"), secured by a pledge of BRW's equity, as well as BRW's 516 million common shares of AVH (which are eligible to be converted into the same number of

15


preferred shares, which maybe be deposited with the depositary for AVH's American Depositary Receipts ("ADRs"), the class of AVH securities that trades on the New York Stock Exchange (the "NYSE"), in exchange for 64.5 million ADRs) (such shares and equity, collectively, the "BRW Loan Collateral"). BRW is currently in default under the BRW Term Loan Agreement. In order to protect the value of its collateral, on May 24, 2019, United began to exercise certain remedies available to it under the terms of the BRW Term Loan Agreement and related documents. In connection with the delivery by United of a notice of default to BRW, Kingsland Holdings Limited ("Kingsland"), AVH's largest minority shareholder, was granted, in accordance with the agreements related to the BRW Term Loan Agreement, authority to manage BRW, which remains the majority shareholder of AVH. After a hearing on September 26, 2019, a New York state court granted Kingsland summary judgment authorizing it to foreclose on the BRW Loan Collateral under the BRW Term Loan Agreement. Kingsland is continuing with the foreclosure process, which is expected to result in a judicially supervised sale of the BRW Loan Collateral. The New York state court also granted Kingsland's motion for a preliminary injunction that, among other things, enjoins BRW Holding from interfering with Kingsland's ability to exercise voting and other rights in certain equity interests in BRW. These rulings are intermediate steps in the judicial foreclosure process in New York and are subject to appeal. The repayment of the BRW Term Loan is dependent on this judicial foreclosure process and there is no assurance that a judicial foreclosure sale will be completed, or, if completed, will result in the full satisfaction of all of the obligations under the BRW Term Loan. Our ability to enforce a deficiency judgment against BRW in the event that the proceeds from the sale of the BRW Loan Collateral in the judicial foreclosure are insufficient to repay the full amount of the BRW Term Loan may be limited. Any of these circumstances may lead to a loss or delay in the repayment of the BRW Term Loan. Further, the amount we receive from the foreclosure sale of the BRW Loan Collateral may be inadequate to fully pay the amounts owed to us by BRW and our costs incurred to foreclose, repossess and sell the property.
In November 2019, United entered into a senior secured convertible term loan agreement (the "AVH Convertible Loan Agreement") with, among others, AVH, as borrower, for the provision by the lenders thereunder (including United) to AVH of convertible term loans for general corporate purposes. In December 2019, United provided such a convertible term loan to AVH under the Convertible Loan Agreement in the aggregate amount of $150 million (the "AVH Convertible Loan").
See Note 8 to the financial statements included in Part II, Item 8 of this report for additional information regarding our investments in AVH and its affiliates.
These transactions and relationships involve significant challenges and risks, particularly given AVH's recent debt restructuring and the judicial foreclosure process to which the repayment of the BRW Term Loan is subject. While AVH has successfully carried out its debt restructuring plan to date, there is no guarantee that such debt restructuring plan will improve AVH's long-term financial condition, United's exposure to which has increased with the completion of the AVH Convertible Loan. While we work closely with Avianca in connection with the JBA, and have supported AVH by providing capital in the form of the AVH Convertible Loan, Avianca is a separately certificated commercial air carrier, and we do not have control over its or AVH's operations, strategy, management or business methods. Avianca is also subject to a number of the same risks as our business, which are described in this Part I, Item 1A, Risk Factors, including competitive pressures on pricing, demand and capacity, changes in aircraft fuel pricing, and the impact of global and local political and economic conditions on operations and customer travel patterns, among others, as well as to its own distinct financial and operational risks.
In addition, the value of the BRW Loan Collateral and the collateral securing the AVH Convertible Loan is subject to market and other conditions. Changes in the aviation market may adversely affect the value of the BRW Loan Collateral and the collateral securing the AVH Convertible Loan and thereby lower the value to be derived from a foreclosure or other exercise of remedies with respect to the BRW Term Loan Agreement or the AVH Convertible Loan. As a result of these and other factors, including delays in foreclosure proceedings, we may not receive full repayment of our BRW Term Loan or our AVH Convertible Loan, and we may be unable to realize the full value of the BRW Loan Collateral or the collateral securing the AVH Convertible Loan. As a consequence, we may not realize a satisfactory return on our invested or loaned funds with respect to AVH and its affiliates.
Further, these investments may not generate the revenue or operational synergies we expect, and they may distract management focus from our operations or other strategic options. Finally, our reliance on Avianca in the region in which it operates may negatively impact our global operations and results if AVH does not successfully recover from its debt restructuring or is otherwise impacted by general business risks or performs below our expectations or needs. Any one or more of these events could have a material adverse effect on our operating results or financial condition.
The airline industry may undergo further change with respect to alliances and JBAs or due to consolidations, any of which could have a material adverse effect on the Company.
The Company faces, and may continue to face, strong competition from other carriers due to the modification of alliances and formation of new JBAs. Carriers may improve their competitive positions through airline alliances, slot swaps and/or JBAs. Certain types of airline JBAs further competition by allowing multiple airlines to coordinate routes, pool revenues and costs,

16


and enjoy other mutual benefits, achieving many of the benefits of consolidation. Open Skies agreements, including the longstanding agreements between the United States and each of the EU, Canada, Japan, Korea, New Zealand, Australia, Colombia and Panama, as well as the more recent agreements between the United States and each of Mexico and Brazil, may also give rise to better integration opportunities among international carriers. Movement of airlines between current global airline alliances could reduce joint network coverage for members of such alliances while also creating opportunities for JBAs and bilateral alliances that did not exist before such realignment. Further airline and airline alliance consolidations or reorganizations could occur in the future. The Company routinely engages in analyses and discussions regarding its own strategic position, including current and potential alliances, asset acquisitions and divestitures and may have future discussions with other airlines regarding strategic activities. If other airlines participate in such activities, those airlines may significantly improve their cost structures or revenue generation capabilities, thereby potentially making them stronger competitors of the Company and potentially impairing the Company's ability to realize expected benefits from its own strategic relationships.
Orders for new aircraft typically must be placed years in advance of scheduled deliveries, and changes in the Company's network strategy over time or other factors outside of the Company's control may make aircraft on order less economic for the Company, result in costs related to modification or termination of aircraft orders or cause the Company to enter into orders for new aircraft on less favorable terms.
The Company's orders for new aircraft are typically made years in advance of actual delivery of such aircraft, and the financial commitment required for purchases of new aircraft is substantial. At December 31, 2019, the Company had firm commitments to purchase 304 new aircraft from The Boeing Company ("Boeing"), Airbus S.A.S ("Airbus") and Embraer S.A. ("Embraer"), as well as related agreements with engine manufacturers, maintenance providers and others. As of December 31, 2019, the Company's commitments relating to the acquisition of aircraft and related spare engines, aircraft improvements and other related obligations aggregated to a total of $26.7 billion.
Subsequent to the Company placing an order for new aircraft, the Company's network strategy may change. As a result, the Company's preference for a particular aircraft that it has ordered, often years in advance, may be decreased or eliminated. If the Company were to modify or terminate any of its existing aircraft order commitments, it may be responsible for material liabilities to its counterparties arising from any such modification. Additionally, the Company may have a need for additional aircraft that are not available under its existing orders. In such cases, the Company may seek to acquire aircraft from other sources, such as through lease arrangements, which may result in higher costs or less favorable terms, or through the purchase or lease of used aircraft. The Company may not be able to acquire such aircraft when needed on favorable terms or at all.
The imposition of new tariffs, or any increase in existing tariffs, on the importation of commercial aircraft that the Company orders may result in higher costs. For example, in October 2019, the United States imposed tariffs on certain imports from the EU, including a customs duty at an ad valorem rate of 10% on new commercial aircraft, which rate, in February 2020, was increased to 15%. These tariffs apply to certain new Airbus aircraft that we have on order. While the scope and rate of these tariffs are subject to change, if and to the extent these tariffs are imposed on us, they could increase the effective cost of, among other things, new Airbus aircraft.
A majority of the Company's aircraft and certain parts are sourced from single suppliers; therefore, the Company would be materially and adversely affected if it were unable to obtain timely deliveries, additional equipment or support from any of these suppliers.
The Company currently sources the majority of its aircraft and many related aircraft parts from Boeing. In addition, our aircraft suppliers are dependent on other suppliers for certain other aircraft parts. Therefore, if the Company is unable to acquire additional aircraft from Boeing, or if Boeing fails to make timely deliveries of aircraft or to provide adequate support for its products, the Company's operations could be materially and adversely affected. The Company is also dependent on a limited number of suppliers for aircraft engines and certain other aircraft parts and could, therefore, also be materially and adversely affected in the event of the unavailability of these engines and other parts.
Union disputes, employee strikes or slowdowns, and other labor-related disruptions could adversely affect the Company's operations and could result in increased costs that impair its financial performance.
United is a highly unionized company. As of December 31, 2019, the Company and its subsidiaries had approximately 96,000 active employees, of whom approximately 84% were represented by various U.S. labor organizations. See Part I, Item 1. Business—Employees, of this report for additional information on our represented employee groups and collective bargaining agreements.
There is a risk that unions or individual employees might pursue judicial or arbitral claims arising out of changes implemented as a result of the Company entering into collective bargaining agreements with its represented employee groups. There is also a possibility that employees or unions could engage in job actions such as slowdowns, work-to-rule campaigns, sick-outs or other

17


actions designed to disrupt the Company's normal operations, in an attempt to pressure the Company in collective bargaining negotiations. Although the RLA makes such actions unlawful until the parties have been lawfully released to self-help, and the Company can seek injunctive relief against premature self-help, such actions can cause significant harm even if ultimately enjoined. Similarly, if the operations of our third-party regional carriers, ground handlers or other vendors are impacted by labor-related disruptions, our operations could be adversely affected. In addition, collective bargaining agreements with the Company's represented employee groups increase the Company's labor costs, which increase could be material.
An outbreak of disease or similar public health threat, such as the coronavirus, could have a material adverse impact on the Company's business, operating results and financial condition.
An outbreak of disease or similar public health threat, or fear of such an event, that affects travel demand, travel behavior, or travel restrictions could have a material adverse impact on the Company's business, financial condition and operating results. In addition, outbreaks of disease could result in increased government restrictions and regulation, including quarantines of our personnel or an inability to access facilities or our aircraft, which could adversely affect our operations.
In December 2019, a novel strain of coronavirus ("COVID-19") was reported in Wuhan, China. The World Health Organization has declared COVID-19 to constitute a "Public Health Emergency of International Concern." On January 30, 2020, the U.S. Department of State issued a Level 4 "do not travel" advisory for China. The U.S. government has also implemented enhanced screenings, quarantine requirements and travel restrictions in connection with the COVID-19 outbreak.  The Company has suspended its flights between the United States and each of Beijing, Chengdu, Shanghai and Hong Kong through April 24, 2020. These routes represented approximately 5% of the Company's 2020 planned capacity and the Company's other trans-Pacific routes represented an additional 10% of the Company's 2020 planned capacity. As of the date of this report, the Company is experiencing an approximately 100% decline in near-term demand to China and an approximately 75% decline in near-term demand on the rest of the Company's trans-Pacific routes. The extent of the impact of the COVID-19 on the Company's operational and financial performance will depend on future developments, including the duration and spread of the outbreak and related travel advisories and restrictions and the impact of the COVID-19 on overall demand for air travel, all of which are highly uncertain and cannot be predicted. If traffic on the Company's trans-Pacific routes were to remain at these levels for an extended period, and/or routes in other parts of the Company's network begin to see significant declines in demand, our results of operations for full year 2020 may be materially adversely affected.
If we experience changes in, or are unable to retain, our senior management team or other key employees, our operating results could be adversely affected.
Much of our future success depends on the continued availability of skilled personnel with industry experience and knowledge, including our senior management team and other key employees. If we are unable to attract and retain talented, highly qualified senior management and other key employees, or if we are unable to effectively provide for the succession of senior management, our business may be adversely affected.
Extended interruptions or disruptions in service at major airports where we operate could have a material adverse impact on our operations.
The airline industry is heavily dependent on business models that concentrate operations in major airports in the United States and throughout the world. An extended interruption or disruption at an airport where we have significant operations could have a material impact on our business, financial condition and results of operation.
We operate principally through our domestic hubs in at Newark, Chicago O'Hare, Denver, Houston Bush, LAX, Guam, SFO and Washington Dulles. Substantially all of our flights either originate in or fly into one of these locations. A significant interruption or disruption in service at one of our hubs or other airports where we have a significant presence resulting from ATC delays, weather conditions, natural disasters, growth constraints, relations with third-party service providers, failure of computer systems, disruptions to government agencies or personnel (including as a result of government shutdowns), disruptions at airport facilities or other key facilities used by us to manage our operations, labor relations, power supplies, fuel supplies, terrorist activities, international hostilities or otherwise could result in the cancellation or delay of a significant portion of our flights and, as a result, could have a material impact on our business, operating results and financial condition. We have minimal control over the operation, quality or maintenance of these services or whether vendors will improve or continue to provide services that are essential to our business.
The airline industry is subject to extensive government regulation, which imposes significant costs and may adversely impact our business, operating results and financial condition.
Airlines are subject to extensive regulatory and legal oversight. Compliance with U.S. and international regulations imposes significant costs and may have adverse effects on the Company. Laws, regulations, taxes and airport rates and charges, both

18


domestically and internationally, have been proposed from time to time that could significantly increase the cost of airline operations or reduce airline revenue. The airline industry is heavily taxed and additional taxation could negatively impact our business.
United provides air transportation under certificates of public convenience and necessity issued by the DOT. If the DOT altered, amended, modified, suspended or revoked these certificates, it could have a material adverse effect on the Company's business. The DOT also regulates consumer protection and, through its investigations or rulemaking authority, could impose restrictions that materially impact the Company's business. The FAA regulates the safety of United's operations. United operates pursuant to an air carrier operating certificate issued by the FAA. The FAA's regulations include stringent pilot flight and duty time requirements under Part 117 of the Federal Aviation Regulations, as well as minimum qualifications for air carrier first officers. These regulations have caused mainline airlines to hire regional pilots, while simultaneously significantly reducing the pool of new pilots from which regional carriers themselves can hire. Although this is an industry issue, it directly affects the Company and has required it to reduce regional partner flying, as several regional partners have experienced difficulty flying their schedules due to reduced pilot availability. From time to time, the FAA also issues orders, airworthiness directives and other regulations relating to the maintenance and operation of aircraft that require material expenditures or operational restrictions by the Company. These FAA orders and directives have resulted in the temporary grounding of an entire aircraft type if the FAA identifies design, manufacturing, maintenance or other issues requiring immediate corrective action (including the FAA Order grounding Boeing 737 MAX aircraft). These FAA directives or requirements could have a material adverse effect on the Company.
In 2018, the U.S. Congress approved a five-year reauthorization for the FAA, which encompasses significant aviation tax and policy-related issues. The law includes a range of policy changes related to airline customer service and aviation safety which are ongoing and, depending on how they are implemented, could impact our operations and costs. Additionally, the U.S. Congress may consider legislation related to aviation safety as well as environmental issues which could impact the Company and the airline industry.
The Company's operations may also be adversely impacted due to the existing antiquated ATC system utilized by the U.S. government and regulated by the FAA. During peak travel periods in certain markets, the current ATC system's inability to handle demand has led to short-term capacity constraints imposed by government agencies and resulted in delays and disruptions of air traffic. In addition, the current system will not be able to effectively handle projected future air traffic growth. The outdated technologies also cause the ATC to be less resilient in the event of a failure, causing flight cancellations and delays. Imposition of these ATC constraints on a long-term basis may have a material adverse effect on the Company's operations. Failure to update the ATC system in a timely manner and the substantial funding requirements of a modernized ATC system that may be imposed on air carriers may have an adverse impact on the Company's financial condition or operating results.
Access to landing and take-off rights, or "slots," at several major U.S. airports and many foreign airports served by the Company are, or recently have been, subject to government regulation. Certain of the Company's major hubs are among the most congested airports in the United States and have been or could be the subject of regulatory action that might limit the number of flights and/or increase costs of operations at certain times or throughout the day. The FAA may limit the Company's airport access by limiting the number of departure and arrival slots at high density traffic airports, which could affect the Company's ownership and transfer rights, and local airport authorities may have the ability to control access to certain facilities or the cost of access to their facilities, which could have an adverse effect on the Company's business. The FAA historically has taken actions with respect to airlines' slot holdings that airlines have challenged; if the FAA were to take actions that adversely affect the Company's slot holdings, the Company could incur substantial costs to preserve its slots or may lose slots. If slots are eliminated at an airport, or if the number of hours of operation governed by slots is reduced at an airport, the lack of controls on take-offs and landings could result in greater congestion both at the affected airport or in the regional airspace (e.g., the New York City metropolitan region airspace) and could significantly impact the Company's operations. Further, the Company's operating costs at airports, including the Company's major hubs, may increase significantly because of capital improvements at such airports that the Company may be required to fund, directly or indirectly. Such costs could be imposed by the relevant airport authority without the Company's approval and may have a material adverse effect on the Company's financial condition.
The ability of carriers to operate flights on international routes between the United States and other countries is highly regulated. Applicable arrangements between the United States and foreign governments may be amended from time to time, government policies with respect to airport operations may be revised, and the availability of appropriate slots or facilities may change. The Company currently operates a number of flights on international routes under government arrangements, regulations or policies that designate the number of carriers permitted to operate on such routes, the capacity of the carriers providing services on such routes, the airports at which carriers may operate international flights, or the number of carriers allowed access to particular airports. Any limitations, additions or modifications to such arrangements, regulations or policies could have a material adverse effect on the Company's financial condition and operating results. Additionally, a change in law,

19


regulation or policy for any of the Company's international routes, such as Open Skies, could have a material adverse impact on the Company's financial condition and operating results and could result in the impairment of material amounts of related tangible and intangible assets. In addition, competition from revenue-sharing JBAs and other alliance arrangements by and among other airlines could impair the value of the Company's business and assets on the Open Skies routes. The Company's plans to enter into or expand U.S. antitrust immunized alliances and JBAs on various international routes are subject to receipt of approvals from applicable U.S. federal authorities and obtaining other applicable foreign government clearances or satisfying the necessary applicable regulatory requirements. There can be no assurance that such approvals and clearances will be granted or will continue in effect upon further regulatory review or that changes in regulatory requirements or standards can be satisfied.
See Part I, Item 1. Business—Industry Regulation, of this report for additional information on government regulation impacting the Company.
We are subject to many forms of environmental regulation and liability and risks associated with climate change, and may incur substantial costs as a result.
Many aspects of the Company's operations are subject to increasingly stringent federal, state, local and international laws protecting the environment, including those relating to emissions to the air, water discharges, safe drinking water and the use and management of hazardous materials and wastes. Compliance with existing and future environmental laws and regulations can require significant expenditures and violations can lead to significant fines and penalties. In addition, from time to time we are identified as a responsible party for environmental investigation and remediation costs under applicable environmental laws due to the disposal of hazardous substances generated by our operations. We could also be subject to environmental liability claims from various parties, including airport authorities, related to our operations at our owned or leased premises or the off-site disposal of waste generated at our facilities.
We may incur substantial costs as a result of changes in weather patterns due to climate change. Increases in the frequency, severity or duration of severe weather events such as thunderstorms, hurricanes, flooding, typhoons, tornados and other severe weather events could result in increases in delays and cancellations, turbulence-related injuries and fuel consumption to avoid such weather, any of which could result in significant loss of revenue and higher costs.
To mitigate climate change risks, CORSIA has been developed by ICAO, a UN specialized agency. CORSIA is intended to create a single global market-based measure to achieve carbon-neutral growth for international aviation after 2020 through airline purchases of carbon offset credits. Certain CORSIA program details remain to be developed and could potentially be affected by political developments in participating countries or the results of the pilot phase of the program, and thus the impact of CORSIA cannot be fully predicted. However, CORSIA is expected to result in increased operating costs for airlines that operate internationally, including the Company.
In addition to CORSIA, the EPA has begun preliminary work to adopt its own aircraft engine GHG emission standards, which were expected to be aligned with recent ICAO carbon dioxide emission standards. The timing of any U.S. EPA aircraft engine GHG emission standards is currently unknown, but some jurisdictions in which United operates have adopted or are considering GHG emission reduction initiatives, which could impact various aspects of the Company's business. The precise nature of future requirements and their applicability to the Company are difficult to predict, but the financial impact to the Company and the aviation industry would likely be adverse and could be significant.
See Part I, Item 1. Business—Industry Regulation—Environmental Regulation, of this report for additional information on environmental regulation impacting the Company.
The United Kingdom's withdrawal from the EU may adversely impact our operations in the United Kingdom and elsewhere.
In June 2016, United Kingdom ("UK") voters approved an advisory referendum for the UK to exit the EU. The UK parliament voted in favor of allowing the government to commence negotiations to determine the future terms of the UK's relationship with the EU, including the terms of trade between the UK and the EU and other nations. On January 31, 2020, the UK withdrew from the EU, and started a transition period that will potentially run through December 31, 2020. The nature and terms of the UK's relationship with the EU after the transition period remain uncertain.
In connection with a UK exit from the EU, we could face new challenges in our operations, such as instability in global financial and foreign exchange markets. This instability could result in market volatility, including in the value of the British pound and European euro, additional travel restrictions on passengers traveling between the UK and other EU countries, changes to the legal status of EU-resident employees, legal uncertainty and divergent national laws and regulations. At this time, we cannot predict the impact that the UK's exit from the EU will have on our business generally and our UK and

20


European operations more specifically, and no assurance can be given that our operating results, financial condition and prospects would not be adversely impacted by the result.
The Company's operating results fluctuate due to seasonality and other factors associated with the airline industry, many of which are beyond the Company's control.
Due to greater demand for air travel during the spring and summer months, revenues in the airline industry in the second and third quarters of the year are generally stronger than revenues in the first and fourth quarters of the year, which are periods of lower travel demand. The Company's operating results generally reflect this seasonality, but have also been impacted by numerous other factors that are not necessarily seasonal, including, among others, extreme or severe weather, outbreaks of disease or pandemics, ATC congestion, geological events, political instability, terrorism, natural disasters, changes in the competitive environment due to industry consolidation, tax obligations, general economic conditions and other factors. As a result, the Company's quarterly operating results are not necessarily indicative of operating results for an entire year and historical operating results in a quarterly or annual period are not necessarily indicative of future operating results.
Increases in insurance costs or inadequate insurance coverage may materially and adversely impact our business, operating results and financial condition.
The Company could be exposed to significant liability or loss if its property or operations were to be affected by a natural catastrophe or other event, including aircraft accidents. The Company maintains insurance policies, including, but not limited to, terrorism, aviation hull and liability, workers' compensation and property and business interruption insurance, but we are not fully insured against all potential hazards and risks incident to our business. If the Company is unable to obtain sufficient insurance with acceptable terms, the costs of such insurance increase materially, or if the coverage obtained is insufficient relative to actual liability or losses that the Company experiences, whether due to insurance market conditions, policy limitations and exclusions or otherwise, our operating results and financial condition could be materially and adversely affected.
The Company has a significant amount of financial leverage from fixed obligations, and insufficient liquidity may have a material adverse effect on the Company's financial condition and business.
The Company has a significant amount of financial leverage from fixed obligations, including aircraft lease and debt financings, leases of airport property and other facilities, and other material cash obligations. In addition, the Company has substantial noncancelable commitments for capital expenditures, including for the acquisition of new aircraft and related spare engines.
Although the Company's cash flows from operations and its available capital, including the proceeds from financing transactions, have been sufficient to meet these obligations and commitments to date, the Company's future liquidity could be negatively affected by the risk factors discussed in this report. If the Company's liquidity is materially diminished, the Company might not be able to timely pay its leases and debts or comply with certain operating and financial covenants under its financing and credit card processing agreements or with other material provisions of its contractual obligations.
The Company's substantial level of indebtedness and non-investment grade credit rating, as well as market conditions and the availability of assets as collateral for loans or other indebtedness, may make it difficult for the Company to raise additional capital if needed to meet its liquidity needs on acceptable terms, or at all.
In addition, as of December 31, 2019, the Company had $3.4 billion in variable rate indebtedness, all or a portion of which uses London interbank offered rates ("LIBOR") as a benchmark for establishing applicable rates. As announced in July 2017, LIBOR is expected to be phased out by the end of 2021. Although many of our LIBOR-based obligations provide for alternative methods of calculating the interest rate payable if LIBOR is not reported, the extent and manner of any future changes with respect to methods of calculating LIBOR or replacing LIBOR with another benchmark are unknown and impossible to predict at this time and, as such, may result in interest rates that are materially higher than current interest rates. If interest rates applicable to the Company's variable interest indebtedness increase, the Company's interest expense will also increase, which could make it difficult for the Company to make interest payments and fund other fixed costs and, in turn, adversely impact our cash flow available for general corporate purposes.
See Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations, of this report for additional information regarding the Company's liquidity.



21


Agreements governing our debt include financial and other covenants. Failure to comply with these covenants could result in events of default.
Our financing agreements include various financial and other covenants. Certain of these covenants require UAL or United, as applicable, to maintain minimum liquidity and/or minimum collateral coverage ratios. UAL's or United's ability to comply with these covenants may be affected by events beyond its control, including the overall industry revenue environment, the level of fuel costs and the appraised value of the collateral. In addition, our financing agreements contain other negative covenants customary for such financings. These covenants are subject to important exceptions and qualifications. If we fail to comply with these covenants and are unable to remedy or obtain a waiver or amendment, an event of default would result.
If an event of default were to occur, the lenders could, among other things, declare outstanding amounts immediately due and payable. In addition, an event of default or declaration of acceleration under one financing agreement could also result in an event of default under other of our financing agreements due to cross-default and cross-acceleration provisions. The acceleration of significant amounts of debt could require us to renegotiate, repay or refinance the obligations under our financing arrangements.
The Company may never realize the full value of its intangible assets or its long-lived assets causing it to record impairments that may negatively affect its financial condition and operating results.
In accordance with applicable accounting standards, the Company is required to test its indefinite-lived intangible assets for impairment on an annual basis, or more frequently where there is an indication of impairment. In addition, the Company is required to test certain of its other assets for impairment where there is any indication that an asset may be impaired.
The Company may be required to recognize losses in the future due to, among other factors, extreme fuel price volatility, tight credit markets, government regulatory changes, decline in the fair values of certain tangible or intangible assets, such as aircraft, route authorities, airport slots and frequent flyer database, unfavorable trends in historical or forecasted results of operations and cash flows and an uncertain economic environment, as well as other uncertainties. For example, in 2019 and 2018, the Company recorded impairment charges of $90 million and $206 million, respectively, associated with its Hong Kong routes, resulting in the full impairment of these assets. The Company can provide no assurance that a material impairment loss of tangible or intangible assets will not occur in a future period. The value of the Company's aircraft could be impacted in future periods by changes in supply and demand for these aircraft. Such changes in supply and demand for certain aircraft types could result from the grounding of aircraft. An impairment loss could have a material adverse effect on the Company's financial condition and operating results.
Any damage to our reputation or brand image could adversely affect our business or financial results.
We operate in a public-facing industry and maintaining a good reputation is critical to our business. The Company's reputation or brand image could be adversely impacted by any failure to maintain satisfactory practices for all of our operations and activities, any failure to achieve and/or make progress toward our environmental and sustainability goals, public pressure from investors or policy groups to change our policies, customer perceptions of our advertising campaigns, sponsorship arrangements or marketing programs, customer perceptions of our use of social media, or customer perceptions of statements made by us, our employees and executives, agents or other third parties. Damage to our reputation or brand image or loss of customer confidence in our services could adversely affect our business and financial results, as well as require additional resources to rebuild our reputation.
ITEM 1B.
UNRESOLVED STAFF COMMENTS.
None.

22


ITEM 2.
PROPERTIES.
Fleet. As of December 31, 2019, United's mainline and regional fleets consisted of the following:
Aircraft Type
 
Total
 
Owned
 
Leased
 
Seats in Standard Configuration
 
 Average Age (In Years)
Mainline:
 
 
 
 
 
 
 
 
 
 
 
777-300ER
 
20

 
20

 

 
350
 
 
2.2

777-200ER
 
55

 
51

 
4

 
267-276
 
 
19.8

777-200
 
19

 
19

 

 
364
 
 
22.5

787-10
 
11

 
11

 

 
318
 
 
0.7

787-9
 
25

 
25

 

 
252
 
 
3.8

787-8
 
12

 
12

 

 
219
 
 
6.5

767-400ER
 
16

 
14

 
2

 
240
 
 
18.3

767-300ER
 
38

 
25

 
13

 
167-214
 
 
23.9

757-300
 
21

 
9

 
12

 
234
 
 
17.3

757-200
 
53

 
48

 
5

 
142-176
 
 
23.5

737-900ER
 
136

 
136

 

 
179
 
 
7.0

737-900
 
12

 
8

 
4

 
179
 
 
18.3

737-800
 
141

 
95

 
46

 
166
 
 
15.8

737-700
 
41

 
29

 
12

 
126
 
 
20.8

A320-200
 
97

 
76

 
21

 
150
 
 
21.3

A319-100
 
80

 
57

 
23

 
126-128
 
 
18.1

Total mainline
 
777

 
635

 
142

 
 
 
 
15.6

In addition to the aircraft presented in the table above, United owned or leased the following mainline aircraft as of December 31, 2019:
Fourteen Boeing 737 MAX 9s, which are temporarily grounded pursuant to the FAA Order;
Four Boeing 747-400s, which are permanently grounded;
Three Airbus A320s, which are temporarily grounded; and
One Boeing 767-200, which is being subleased to another airline.
Aircraft Type
 
Total
 
Owned
 
Owned or Leased by Regional Carrier
 
Regional Carrier Operator and Number of Aircraft
 
Seats in Standard Configuration
Regional:
 
 

 
 

 
 
 
 
 
 
 
Embraer E175/E175LL
 
170

 
71

 
99

 
SkyWest:
Mesa:
Republic:
ExpressJet:
65
60
28
17

 
70-76

Embraer 170
 
38

 

 
38

 
Republic:
38

 
70

CRJ700
 
47

 

 
47

 
Mesa:
SkyWest:
GoJet:
20
19
8

 
70

CRJ550
 
18

 

 
18

 
GoJet:
18

 
50

CRJ200
 
133

 

 
133

 
SkyWest:
Air Wisconsin:
70
63

 
50

Embraer ERJ 145 (XR/LR/ER)
 
175

 
168

 
7

 
ExpressJet:
Trans States:
CommutAir:
95
43
37

 
50

Total regional
 
581

 
239

 
342

 
 
 
 
 
In addition to the aircraft presented in the table above, United owned the following regional aircraft as of December 31, 2019:
Eight Embraer E175LLs, which were delivered but not yet in service; and
Three Embraer ERJ145s, which are temporarily grounded.


23


Firm Order and Option Aircraft. As of December 31, 2019, United had firm commitments and options to purchase new aircraft from Boeing, Airbus and Embraer as presented in the table below:
 
 
 
 
Scheduled Aircraft Deliveries
Aircraft Type
 
Number of Firm
Commitments (a)
 
2020
 
After 2020
Airbus A321XLR
 
50

 

 
50

Airbus A350
 
45

 

 
45

Boeing 737 MAX
 
171

 
44

 
127

Boeing 777-300ER
 
2

 
2

 

Boeing 787
 
16

 
15

 
1

Embraer E175
 
20

 
20

 

(a) United also has options and purchase rights for additional aircraft.
The aircraft listed in the table above are scheduled for delivery through 2030. The Company expects to assign the purchase obligation for each of the 20 Embraer E175 aircraft to one of its regional partners at the time of such aircraft's delivery, subject to certain conditions. To the extent the Company and the aircraft manufacturers with which the Company has existing orders for new aircraft agree to modify the contracts governing those orders, the amount and timing of the Company's future capital commitments could change. United also has agreements to purchase 20 used Airbus A319 aircraft with expected delivery dates through 2022 and 19 used Boeing 737-700 aircraft with expected delivery dates through 2021.
The 44 Boeing 737 MAX aircraft in the table above include 16 Boeing B737 MAX aircraft of which the Company planned to take delivery in 2019, and 28 aircraft of which the Company planned to take delivery of in 2020; however, following the FAA Order, Boeing suspended deliveries of new Boeing 737 MAX aircraft. The extent of the delay to the scheduled deliveries of new 737 MAX aircraft is expected to be impacted by the length of time the FAA Order remains in place, Boeing's production rate and the pace at which Boeing can deliver aircraft following the lifting of the FAA Order, among other factors. As a result, the Company is unable to estimate the number of Boeing 737 MAX aircraft of which it will take delivery in 2020.
See Notes 10 and 13 to the financial statements included in Part II, Item 8 of this report for additional information.
Facilities. United leases gates, hangar sites, terminal buildings and other airport facilities in the municipalities it serves. United has major terminal facility leases at SFO, Washington Dulles, Chicago O'Hare, LAX, Denver, Newark, Houston Bush and Guam with expiration dates ranging from 2020 through 2053. Substantially all of these facilities are leased on a net-rental basis, resulting in the Company's responsibility for maintenance, insurance and other facility-related expenses and services.
United also maintains administrative, catering, cargo, training, maintenance and other facilities to support its operations in the cities it serves. In addition, United has multiple leases, which expire from 2020 through 2033, for its principal executive office and operations center in downtown Chicago and administrative offices in downtown Houston.
ITEM 3.
LEGAL PROCEEDINGS.
On June 30, 2015, UAL received a Civil Investigative Demand ("CID") from the Antitrust Division of the DOJ seeking documents and information from the Company in connection with a DOJ investigation related to statements and decisions about airline capacity. The Company has completed its response to the CID. The Company is not able to predict what action, if any, might be taken in the future by the DOJ or other governmental authorities as a result of the investigation. Beginning on July 1, 2015, subsequent to the announcement of the CID, UAL and United were named as defendants in multiple class action lawsuits that asserted claims under the Sherman Antitrust Act, which have been consolidated in the United States District Court for the District of Columbia. The complaints generally allege collusion among U.S. airlines on capacity impacting airfares and seek treble damages. The Company intends to vigorously defend against the class action lawsuits.
On October 13, 2015, United received a CID from the Civil Division of the DOJ. The CID requested documents and oral testimony from United in connection with an industry-wide DOJ investigation related to delivery scan and other data purportedly required for payment for the carriage of mail under United's International Commercial Air Contracts with the U.S. Postal Service. The Company has been responding to the DOJ's request and cooperating in the investigation since that time. On November 8, 2016, the DOJ Criminal Division met with representatives from the Company and advised they are conducting an industry-wide investigation into the same matter. The Company continues to cooperate with the government in their investigation and representatives from the Company have met with both the Civil and Criminal Divisions to provide additional information. The Company cannot predict what action, if any, might be taken in the future by the DOJ or other governmental authorities as a result of these investigations.

24


Other Legal Proceedings. The Company is involved in various other claims and legal actions involving passengers, customers, suppliers, employees and government agencies arising in the ordinary course of business. Additionally, from time to time, the Company becomes aware of potential non-compliance with applicable environmental regulations, which have either been identified by the Company (through internal compliance programs such as its environmental compliance audits) or through notice from a governmental entity. In some instances, these matters could potentially become the subject of an administrative or judicial proceeding and could potentially involve monetary sanctions. After considering a number of factors, including (but not limited to) the views of legal counsel, the nature of contingencies to which the Company is subject and prior experience, management believes that the ultimate disposition of these other claims and legal actions will not materially affect its consolidated financial position or results of operations. However, the ultimate resolutions of these matters are inherently unpredictable. As such, the Company's financial condition and results of operations could be adversely affected in any particular period by the unfavorable resolution of one or more of these matters.
ITEM 4.
MINE SAFETY DISCLOSURES.
Not applicable.
PART II
 
ITEM 5.
MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.
UAL's common stock is listed on the Nasdaq Global Select Market ("Nasdaq") under the symbol "UAL." As of February 18, 2020, there were 5,073 holders of record of UAL common stock.
The following graph shows the cumulative total stockholder return for UAL's common stock during the period from December 31, 2014 to December 31, 2019. The graph also shows the cumulative returns of the Standard and Poor's 500 Index ("SPX") and the NYSE Arca Airline Index ("XAL") of 14 investor-owned airlines over the same five-year period. The comparison assumes $100 was invested on December 31, 2014 in each of UAL common stock, the SPX and the XAL.
https://cdn.kscope.io/e241014cc2b8395930eba8a3e1e5aeca-a2019performancev2.jpg
Note: The stock price performance shown in the graph above should not be considered indicative of potential future stock price performance. The foregoing performance graph is being furnished as part of this report solely in accordance with the requirement under Rule 14a-3(b)(9) to furnish our stockholders with such information, and therefore, shall not be deemed to be filed or incorporated by reference into any filings by the Company under the Securities Act or the Exchange Act.


25


The following table presents repurchases of UAL common stock made in the fourth quarter of 2019:
Period
 
Total number of shares purchased (a) (b)
 
Average price paid per share (b)(c)
 
Total number of shares purchased as part of publicly announced plans or programs (a)
 
Approximate dollar value of shares that may yet be purchased under the plans or programs (in millions) (a)
October 2019
 
1,071,915

 
$
87.65

 
1,071,915

 
$
3,231

November 2019
 
430,400

 
92.70

 
430,400

 
3,191

December 2019
 
922,600

 
88.72

 
922,600

 
3,109

Total
 
2,424,915

 
 
 
2,424,915

 
 
(a) In 2019, UAL repurchased approximately 19.2 million shares of UAL common stock for $1.6 billion. In December 2017, UAL's Board of Directors authorized a $3.0 billion share repurchase program to acquire UAL's common stock. In July 2019, UAL's Board of Directors authorized a new $3.0 billion share repurchase program to acquire UAL's common stock, in addition to any amounts remaining under the prior program. As of December 31, 2019, the Company had approximately $3.1 billion remaining to purchase shares under its repurchase programs. UAL may repurchase shares through the open market, privately negotiated transactions, block trades or accelerated share repurchase transactions from time to time in accordance with applicable securities laws.
(b) The table does not include shares withheld from employees to satisfy certain tax obligations due upon the vesting of restricted stock. The United Continental Holdings, Inc. 2017 Incentive Compensation Plan and the United Continental Holdings, Inc. 2008 Incentive Compensation Plan, each provide for the withholding of shares to satisfy tax obligations due upon the vesting of restricted stock. However, these plans do not specify a maximum number of shares that may be withheld for this purpose. A total of 1,930 shares were withheld under the plans in the fourth quarter of 2019 at an average price of $89.67 per share. These shares of common stock withheld to satisfy tax withholding obligations may be deemed to be "issuer purchases" of shares that are required to be disclosed pursuant to this Item.
(c) Average price paid per share is calculated on a settlement basis and excludes commission.
ITEM 6.
SELECTED FINANCIAL DATA.        
UAL's consolidated financial statements and statistical data are provided in the tables below:
 
 
Year Ended December 31,
 
 
2019
 
2018 (a)
 
2017 (a)
 
2016
 
2015
Income Statement Data (in millions, except per share amounts):
 
 
 
 
 
 
 
 
 
 
Operating revenue
 
$
43,259

 
$
41,303

 
$
37,784

 
$
36,558

 
$
37,864

Operating expense
 
38,958

 
38,074

 
34,166

 
32,214

 
32,698

Operating income
 
4,301

 
3,229

 
3,618

 
4,344

 
5,166

Net income
 
3,009

 
2,122

 
2,143

 
2,234

 
7,340

Basic earnings per share
 
11.63

 
7.70

 
7.08

 
6.77

 
19.52

Diluted earnings per share
 
11.58

 
7.67

 
7.06

 
6.76

 
19.47

 
 
 
 
 
 
 
 
 
 
 
Balance Sheet Data at December 31 (in millions):
 
 
 
 
 
 
 
 
 
 
Unrestricted cash, cash equivalents and short-term investments
 
$
4,944

 
$
3,950

 
$
3,798

 
$
4,428

 
$
5,196

Total assets
 
52,611

 
49,024

 
47,469

 
40,208

 
40,861

Debt and finance lease obligations (b)
 
14,818

 
13,792

 
13,576

 
11,705

 
11,759

(a) Amounts adjusted due to the adoption of Accounting Standard Update No. 2016-02, Leases (Topic 842). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.
(b) Finance leases, under Topic 842, are the equivalent of capital leases under Financial Accounting Standards Board Accounting Standards Codification Topic 840, Leases.


26


 
 
Year Ended December 31,
 
 
2019
 
2018
 
2017
 
2016
 
2015
Select operating statistics (a)
 
 
 
 
 
 
 
 
 
 
Passengers (thousands) (b)
 
162,443

 
158,330

 
148,067

 
143,177

 
140,369