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    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001415929</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
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    <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>Sheldon Scott</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>1500</noOfUnitsSold>
      <aggregateMarketValue>143551.85</aggregateMarketValue>
      <noOfUnitsOutstanding>18121668</noOfUnitsOutstanding>
      <approxSaleDate>04/14/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/29/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1500</amountOfSecuritiesAcquired>
      <paymentDate>01/29/2023</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Scott Sheldon</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>02/06/2023</saleDate>
      <amountOfSecuritiesSold>7304</amountOfSecuritiesSold>
      <grossProceeds>706363.22</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>04/14/2023</noticeDate>
      <signature>/s/ Lisa Gerard, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Scott Sheldon</signature>
    </noticeSignature>
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144
0001415929
XXXXXXXX
LIVE
0001362468
Allegiant Travel CO
001-33166
1201 N. TOWN CENTER DRIVE
LAS VEGAS
NV
89144
702-851-7300
Sheldon Scott
Officer
Common
Fidelity Brokerage Services LLC
900 Salem Street
Smithfield
RI
02917
1500
143551.85
18121668
04/14/2023
NASDAQ
Common
01/29/2023
Restricted Stock Vesting
Issuer
N
1500
01/29/2023
Compensation
N
Scott Sheldon
1201 North Town Center Drive
Las Vegas
NV
89144
Common
02/06/2023
7304
706363.22
04/14/2023
/s/ Lisa Gerard, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Scott Sheldon