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>0000938673</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001362468</issuerCik>
        <issuerName>Allegiant Travel CO</issuerName>
        <secFileNumber>001-33166</secFileNumber>
        <issuerAddress>
          <com:street1>1201 N. TOWN CENTER DRIVE</com:street1>
          <com:city>LAS VEGAS</com:city>
          <com:stateOrCountry>NV</com:stateOrCountry>
          <com:zipCode>89144</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>702-851-7300</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>GALLAGHER MAURICE J JR</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</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>10382</noOfUnitsSold>
        <aggregateMarketValue>842684.47</aggregateMarketValue>
        <noOfUnitsOutstanding>18343946</noOfUnitsOutstanding>
        <approxSaleDate>11/26/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/29/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3285</amountOfSecuritiesAcquired>
        <paymentDate>01/29/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/29/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5080</amountOfSecuritiesAcquired>
        <paymentDate>01/29/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/29/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2017</amountOfSecuritiesAcquired>
        <paymentDate>01/29/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Maurice Gallagher</name>
          <address>
            <com:street1>1201 North Town Center Drive</com:street1>
            <com:city>Las Vegas</com:city>
            <com:stateOrCountry>NV</com:stateOrCountry>
            <com:zipCode>89144</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/25/2024</saleDate>
        <amountOfSecuritiesSold>28319</amountOfSecuritiesSold>
        <grossProceeds>2391682.12</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/26/2024</noticeDate>
        <signature>/s/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Maurice Gallagher</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4525}]
text: 144
  0000938673
  XXXXXXXX
  LIVE
  0001362468
  Allegiant Travel CO
  001-33166
  1201 N. TOWN CENTER DRIVE
  LAS VEGAS
  NV
  89144
  702-851-7300
  GALLAGHER MAURICE J JR
  Director
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  10382
  842684.47
  18343946
  11/26/2024
  NASDAQ
  Common
  01/29/2022
  Restricted Stock Vesting
  Issuer
  N
  3285
  01/29/2022
  Compensation
  Common
  01/29/2023
  Restricted Stock Vesting
  Issuer
  N
  5080
  01/29/2023
  Compensation
  Common
  01/29/2024
  Restricted Stock Vesting
  Issuer
  N
  2017
  01/29/2024
  Compensation
  N
  Maurice Gallagher
  1201 North Town Center Drive
  Las Vegas
  NV
  89144
  Common
  11/25/2024
  28319
  2391682.12
  11/26/2024
  /s/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Maurice Gallagher