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United Airlines Holdings, Inc.

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Your Vote Counts! UNITED AIRLINES HOLDINGS, INC.2021 Annual Meeting on May 26, 2021 Vote by May 25, 2021 10:59 PM CT. For shares held in a Plan, vote by May 23, 2021 10:59 PM CT.UNITED AIRLINES HOLDINGS, INC. 233 SOUTH WACKER DRIVE CHICAGO, IL 60606D46527-P54296-Z79624You invested in UNITED AIRLINES HOLDINGS, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on May 26, 2021. Get informed before you vote View the Notice of Annual Meeting and Proxy Statement, Annual Report and 401(k) Plans Letter online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 12, 2021. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. We encourage you to access and review all of the important information contained in the proxy materials before voting.For complete information and to vote, visit www.ProxyVote.com Control #Smartphone users Point your camera here and vote without entering a control numberVirtually at:Vote Virtually During the Meeting May 26, 2021 9:00 a.m., Central Timewww.virtualshareholdermeeting.com/UAL2021 





Vote at www.ProxyVote.comTHIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters.Voting Items 1. Election of Directors Nominees: 1a. Carolyn Corvi 1b. Barney Harford 1c. Michele J. Hooper 1d. Walter Isaacson 1e. James A. C. Kennedy 1f. J. Scott Kirby 1g. Edward M. Philip 1h. Edward L. Shapiro 1i. David J. Vitale 1j. Laysha Ward 1k. James M. Whitehurst 2. Ratification of the Appointment of Ernst & Young LLP as the Company’s Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2021 3. Advisory Vote to Approve the Compensation of the Company’s Named Executive Officers 4. Approve the United Airlines Holdings, Inc. 2021 Incentive Compensation Plan 5. Approve and Adopt an Amendment and Restatement of the Company’s Certificate of Incorporation to Preserve Certain Tax Benefits 6. Approve the Company’s Tax Benefits Preservation Plan 7. Stockholder Proposal Regarding Disclosure of Political Spending 8. Stockholder Proposal Regarding a Report on Climate-related Lobbying Activities NOTE: The proxies are authorized to vote in their discretion upon such other business as may properly come before the meeting or any adjournment thereof.Board RecommendsFor For For For For For For For For For For For For For ForFor Against AgainstPrefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”.D46528-P54296-Z79624