Allegiant charges a fee to change most flights, but a few situations let you change for free

Allegiant Air does not let you change flights without a fee in most cases. The airline charges a change fee that varies by how far in advance you book and when you want to move your flight. However, Allegiant will waive the change fee if the airline itself changes your flight time, cancels your flight, or downgrades your seat class — and in those cases, you can also request a refund instead of a rebooking.

The change fee applies whether you want to move to a different date, a different time on the same date, or a different route entirely. You pay the fee to Allegiant directly, separate from any difference in ticket price between your original flight and the new one. If the new flight costs more, you pay both the change fee and the price difference.

Key Takeaways

  • Allegiant charges a change fee for most flight modifications, with the amount depending on when you booked and when you want to travel.
  • You can change your flight for free only if Allegiant changes your flight time, cancels your flight, or downgrades your seat, and you also have the option to request a refund instead.
  • Changing your flight through Allegiant's website or app costs the same as calling customer service, so use whichever method is fastest for you.
  • If you need to change your flight within 24 hours of booking, Allegiant allows you to cancel and rebook at no cost under their 24-hour cancellation policy.

When Allegiant waives the change fee

Allegiant will not charge you to change your flight if the airline initiates the change. This means Allegiant moved your departure or arrival time, cancelled your flight outright, or reduced the class of seat you booked (for example, moving you from a seat with extra legroom to a standard seat). In any of these situations, you can move to a different flight at no charge.

You also have the option to request a refund instead of rebooking. If Allegiant cancels your flight and you decide not to fly, you can get your money back. The refund goes back to your original payment method, though it may take several business days to appear in your account. If Allegiant changes your time significantly and you no longer want to travel, a refund is often faster than trying to rebook on a flight that works for you.

The 24-hour cancellation window

Allegiant allows you to cancel any flight within 24 hours of booking and receive a full refund, with no change fee involved. This is a federal requirement that applies to all airlines, not an Allegiant-specific policy. If you booked your flight and want to cancel it within that window, you can do so through your Allegiant account online or by calling customer service.

After 24 hours have passed, cancelling your flight results in a credit toward future travel on Allegiant, not a refund to your original payment method. If you want to change to a different flight instead of cancelling, the change fee applies after the 24-hour window closes. The clock starts from the moment your booking confirmation is issued, not from when you complete payment.

How much Allegiant's change fee costs

Allegiant's change fee ranges from roughly $25 to $75 depending on when you booked and when you want to travel. Flights booked further in advance typically have lower change fees than flights booked close to departure. The exact amount appears on Allegiant's website when you start the change process — you will see the fee before you confirm the change.

The change fee is separate from any price difference between your original flight and the new one. If you are moving to a more expensive flight, you pay the change fee plus the price difference. If you are moving to a cheaper flight, you pay the change fee and receive a credit for the difference, which Allegiant applies to future bookings rather than refunding to your card.

How to change your Allegiant flight

You can change your flight through Allegiant's website, mobile app, or by calling customer service at 702-505-8888. The website and app show you available flights, the change fee, and any price difference before you confirm. Calling takes longer but may be useful if you need to discuss options with a representative or if you are having trouble navigating the website.

To change online, log into your Allegiant account, find your booking, and select the option to change your flight. You will choose a new date and time, review the fees and price difference, and complete the change. The new confirmation appears in your email within minutes. If you call, have your confirmation number and the phone number associated with your booking ready.

What happens if you miss your flight

If you miss your flight, Allegiant treats it as a no-show. You cannot change to a later flight on the same day for free. Instead, you would need to rebook on a future flight and pay the change fee plus any price difference. Some airlines allow you to rebook the same day at no cost if you miss your flight, but Allegiant does not offer this option.

The best way to avoid this situation is to arrive at the airport early and set phone reminders for your departure time. If you know you cannot make your flight, change it before departure rather than missing it — you will only pay the change fee, not the change fee plus a new ticket price.

Frequently Asked Questions

Can I change my flight to a different airline for free?

No. Allegiant only allows you to change to a different Allegiant flight. If you want to fly with another airline, you would need to cancel your Allegiant booking (which gives you a credit, not a refund, after 24 hours) and purchase a new ticket with the other airline.

What if I change my flight and the new one is cheaper?

You still pay the change fee. Allegiant does not refund the difference to your card; instead, the difference becomes a credit in your Allegiant account that you can use toward a future booking. You lose the credit if you do not use it within a certain period.

Can I change my flight multiple times?

Yes, but you pay the change fee each time. If you change your flight three times, you pay three separate change fees. There is no limit on how many times you can change, but each change costs money unless Allegiant initiates the change.

Do I have to change my flight online, or can I do it at the airport?

You can change your flight at the airport ticket counter, but it is usually faster to do it online or through the app. The fee is the same either way. If you are already at the airport and your flight is within a few hours, the ticket counter may be your only option.