Allegiant Air Flight Change Policy

Allegiant Air Flight Change: When you snag a cheap ticket on an ultra-low-cost carrier, you’re usually trading flexibility for a lower price. Allegiant Air is the king of this model. If your plans shift and you need to adjust your itinerary, the Allegiant Air Flight Change Policy is noticeably different from the "no-change-fee" world of Delta or United.

To navigate an Allegiant change without losing the value of your ticket, you have to be mindful of two things: the calendar and whether or not you bought "protection" at checkout. Here is the full breakdown of how to modify your booking .

The 24-Hour Rule: Your Only "Free" Window

Federal law provides a small safety net for all travelers. If you booked your flight at least one week (168 hours) before the scheduled departure, you can change or cancel your entire itinerary for a full refund within 24 hours of purchase.

Tip: This is the only time you can get your actual cash back. After this 24-hour window, Allegiant shifts almost exclusively to issuing "Credit Vouchers" rather than refunds.

Standard Changes (No Trip Flex)

If you didn’t buy any travel protection, the Allegiant Air Flight Change Policy is strictly governed by the "7-Day Rule."

1. The Deadline

You must make any changes at least seven days before your flight departs. If you are within that seven-day window, the airline typically will not allow any changes, and your fare is essentially forfeited if you don't fly.

2. The Fees

Expect to pay a change fee of $25 per person, per segment.

What is a segment? It’s one takeoff and one landing. If you have a round-trip flight, that’s two segments, meaning a $50 change fee per person.
Fare Difference: In addition to the fee, you must pay any increase in the ticket price. If the new flight is cheaper, Allegiant generally will not refund the difference—they simply keep it as part of the transaction.

Trip Flex: The Game Changer

When you book, Allegiant offers an add-on called Trip Flex. It usually costs between $29 and $43 per person. If you think there’s even a 10% chance your plans might change, it’s almost always worth it.

With Trip Flex:

One Free Change: You can change your date or destination once without paying the $25-per-segment fee.
Last-Minute Flexibility: You can modify your flight up to one hour before departure (compared to the 7-day cutoff for standard tickets).
Credit Vouchers: If you cancel entirely, you receive a credit voucher for the full amount (minus the Trip Flex fee) for future use.

Manually Edited Insight: The "Segment" Math Warning

I really want to emphasize how quickly those "small" fees add up because I’ve seen it happen to plenty of travelers at the gate. If you’re a family of four on a round-trip ticket and you need to move your dates by just one day, that $25-per-segment fee becomes $200 in total ($25 x 2 segments x 4 people). That’s often more than the cost of a brand-new ticket! This is why I always tell people to look at the total cost of a new booking before they bother "modifying" an old one. Sometimes it’s actually cheaper to just walk away from the old flight and start fresh, especially if the fare difference on the new dates is significant. Don't let the "change" button trick you into spending more than you have to.

How to Modify Your Booking Online

Allegiant is a "digital-first" airline. If you call their customer service line to change a flight, they may charge an additional $14.99 "Call Center Fee" per segment. Always try the website or app first.

Go to AllegiantAir.com and click on "Manage Travel."
Enter your confirmation code and last name.
Find the "Modify Trip" link in your Trip Summary.
Choose the new flight from the calendar. The system will automatically calculate the new total, including any fare differences and applicable fees.
Confirm and Pay: Your old seat is released the moment you confirm the new one.

What Happens if Allegiant Changes Your Flight?

If the airline is the one to initiate the change (due to weather, mechanical issues, or schedule shifts), the Allegiant Air Flight Change Policy works in your favor.

Significant Delays: If your flight is rescheduled to a different day or delayed by a significant margin (usually 2 hours or more), you are typically entitled to a full refund to your original form of payment if the new time doesn't work for you.
Automatic Updates: Allegiant will usually email you with a new itinerary. You can either accept it or use the "Manage Travel" tool to look for alternative flights on nearby dates for no extra charge.

Summary Table: Change Costs & Deadlines

Ticket Type	Change Fee (Per Segment)	Deadline to Change
Within 24-Hr Window	$0	24 hours after booking
Standard Ticket	$25	7 days before departure
Trip Flex Ticket	$0 (One-time)	1 hour before departure
Vacation Package	$25 + Partner Fees	72 hours before departure

A Note on Vacation Packages

If your booking includes a hotel or rental car, the rules are stricter. You generally must make changes at least 72 hours before departure, and you may be subject to additional fees from the hotel or car rental agency that Allegiant cannot waive.

The Allegiant Air Flight Change Policy is designed to keep their base fares low by charging for flexibility. By knowing the 7-day cutoff and the value of Trip Flex, you can stay in control of your travel budget even when life gets unpredictable.