Allegiant Air LLC marketed as Allegiant Air is a currently operating North American scheduled low-cost airline company with its base in Harry Reid International Airport, Las Vegas, United States. Carrier's 2-char IATA designator is G4, 3-character ICAO designator is AAY. Established 25 years ago in 1997, the airline is one of the mature carriers. Allegiant Air offers a web check-in option for the convenience of its passengers. Frequent travelers could also use the airline's official iOS and Android apps that are available to download from AppStore and Google Play. The most recent version of Allegiant Air baggage policy (last updated 2022) is available on the airline's official website by the link above.
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