Allegiant Airlines Reservations and Booking Tickets If you are looking to fly with Allegiant Airlines, then the first thing that you need to do is to make your reservations or book the tickets, you can do from our online Allegiant Airlines website. You can do the same by either calling us on our Allegiant Airlines Phone Number. You can also obtain your boarding pass after having done your Allegiant Airlines Booking, by completing your web check in with us. The team of Allegiant Airlines Phone Number helps you to book your ticket by following the easy process for any destination. We reserve your air flight seats at cheapest rates possible. If any customer needs to book their flight, they can use our Allegiant Airlines Phone Number for getting help. If you want to save your time and do not wish to stand in a long queue, then book your ticket at an online website.