Purchasing Allegiant flight tickets is simple. To begin, go to the airline's website and book a flight. Select "Flight" from the drop-down menu in the page's upper left corner. After you've selected your flight, you'll be sent to a page where you'll need to fill out the necessary travel information. Make a note of where you'll be going from and where you'll be arriving. Then choose whether you want to book a one-way or round-trip flight. Fill in the number of persons or children who will be traveling with you. Once you've attained all of the fields, quickly press the enter key. On the given date, you will receive a list of available flights. Now is the time to Allegiant Airlines Booking for your vacation.