content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001724931</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000100517</issuerCik>
        <issuerName>United Airlines Holdings, Inc.</issuerName>
        <secFileNumber>001-06033</secFileNumber>
        <issuerAddress>
          <com:street1>E. ANNA HA - WHQLD</com:street1>
          <com:street2>233 SOUTH WACKER DRIVE</com:street2>
          <com:city>CHICAGO</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60606</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>872-825-4000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Gebo Kate</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>35000</noOfUnitsSold>
        <aggregateMarketValue>2819135.58</aggregateMarketValue>
        <noOfUnitsOutstanding>328875900</noOfUnitsOutstanding>
        <approxSaleDate>11/01/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/02/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>11269</amountOfSecuritiesAcquired>
        <paymentDate>02/02/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/28/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>6231</amountOfSecuritiesAcquired>
        <paymentDate>02/28/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/28/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>776</amountOfSecuritiesAcquired>
        <paymentDate>02/28/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/09/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>9759</amountOfSecuritiesAcquired>
        <paymentDate>02/09/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/02/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1926</amountOfSecuritiesAcquired>
        <paymentDate>02/02/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/28/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5039</amountOfSecuritiesAcquired>
        <paymentDate>02/28/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>17,500 shares of today's sale occurred in the Mary Kathryn Gebo Rev Trust account in which Mary K. Gebo is the trustee. 17,500 shares of today's sale occurred in the John Ray Gebo Rev Trust, John R. Gebo is the spouse of Mary K. Gebo. Kate Gebo and Mary K. Gebo are one and the same person.</remarks>
      <noticeSignature>
        <noticeDate>11/01/2024</noticeDate>
        <signature>/S/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mary K. Gebo</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 5897}]
text: 144
  0001724931
  XXXXXXXX
  LIVE
  0000100517
  United Airlines Holdings, Inc.
  001-06033
  E. ANNA HA - WHQLD
  233 SOUTH WACKER DRIVE
  CHICAGO
  IL
  60606
  872-825-4000
  Gebo Kate
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  35000
  2819135.58
  328875900
  11/01/2024
  NASDAQ
  Common
  02/02/2023
  Restricted Stock Vesting
  Issuer
  N
  11269
  02/02/2023
  Compensation
  Common
  02/28/2023
  Restricted Stock Vesting
  Issuer
  N
  6231
  02/28/2023
  Compensation
  Common
  02/28/2021
  Restricted Stock Vesting
  Issuer
  N
  776
  02/28/2021
  Compensation
  Common
  02/09/2022
  Restricted Stock Vesting
  Issuer
  N
  9759
  02/09/2022
  Compensation
  Common
  02/02/2023
  Restricted Stock Vesting
  Issuer
  N
  1926
  02/02/2023
  Compensation
  Common
  02/28/2023
  Restricted Stock Vesting
  Issuer
  N
  5039
  02/28/2023
  Compensation
  Y
  17,500 shares of today's sale occurred in the Mary Kathryn Gebo Rev Trust account in which Mary K. Gebo is the trustee. 17,500 shares of today's sale occurred in the John Ray Gebo Rev Trust, John R. Gebo is the spouse of Mary K. Gebo. Kate Gebo and Mary K. Gebo are one and the same person.
  11/01/2024
  /S/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mary K. Gebo