Allegiant Booking process is to go to the airline’s website, You may plan and organize your entire trip there. To begin making a reservation, go to Allegiant’s website and follow the simple instructions. Through the website, you may arrange one-way, round-trip, and multi-city journeys. Additionally, you can also use our assistance; simply give us a call and describe your trip requirements. We will set up the proper arrangements for you, not just for the one-way trip but for the entire one. Allegiant Air is a good option for budget-minded travelers who are looking for low fares on flights to popular destinations. However, passengers should be aware that there are some drawbacks to flying in economy class with Allegiant.