People often want to add or subtract from their already booked flight. To manage your Allegiant Airlines booking needs such as Changing the name and the date, Adding extra luggage to your travel plans, Changing the seating arrangement, Requesting a refund for a ticket, Cancellation of the current flight, and Choosing the ideal seats are allowed at Allegiant. For this visit to the official site, navigate to the section "Manage Trips." You will be taken to a new page where you must enter your flight details. Start by typing the first name on the flier. Type the surname after that. Now, click the Proceed button after inputting the confirmation code.