Allegiant Airlines is a well-known low-cost airline established in the United States that has a large workforce and performs daily scheduled flights. It connects to a variety of fleet services, with the bulk of passengers contacting Allegiant Airlines Reservations to book a flight online. It has offices all around the world, including one in the United States, in Las Vegas, Nevada. If you need to purchase or cancel a flight ticket online, call Allegiant Air Phone Number, which will connect you to an allegiant airline Reservations service specialist who will give you with the most accurate travel information in a fast manner.