Allegiant Air is an American airline running both scheduled and charter airlines. It is the ninth-largest commercial airline in the U.S. as a global air carrier. With its convenient routes, low fares, and non-stop flights, Allegiant has become one of the mostly preferred airlines for both domestic and international travel. In fact, the airline promises its passengers with all the luxurious extravagance onboard. The deals that they offer to the passengers for flight reservations is simply unmatchable, and probably this is the reason why it is now one of the major airlines of the USA.