Travelers can get only first-class seats on Allegiant Air because the airline does not provide cabins with a dedicated private space for their travelers, but travelers can get the necessary services and facilities by purchasing bundles that include extra options to select a premium extra legroom seat, lounge access, extra baggage, and priority boarding during booking. To learn more details about Allegiant Air First Class bookings, travelers can visit the official website or read the blog provided by Fares First Class.