To cancel an Allegiant Air flight, log in to Manage Travel on Allegiant’s website using your confirmation number and last name. From there, you can select your trip and choose to cancel. What you receive depends on your fare and timing—many tickets result in a travel credit rather than a refund, and fees may apply unless you purchased Trip Flex or canceled within the 24-hour window after booking. If the site won’t allow the change, an Allegiant agent can help review your options.
