What is the 4312458912345 ALLEGIANT AIR charge?

Decoding 4312458912345 ALLEGIANT AIR

A billing descriptor showing 4312458912345 ALLEGIANT AIR corresponds to an airline ticket or an ancillary travel service purchased through Allegiant Travel Company. Allegiant Air is an ultra-low-cost American carrier that connects regional communities to vacation destinations like Las Vegas and Orlando. The long number preceding the airline name is the passenger ticket document number, where the leading digits 431 represent the official three-digit airline accounting code assigned to Allegiant by the International Air Transport Association (IATA).

Because Allegiant operates on an unbundled fare structure, an initial booking covers only basic seat transportation and a small personal item. Extra choices you make during checkout or at the airport terminal post under this same merchant descriptor. Routine charges include checked bag fees, carry-on allowances, seat assignments, Priority Boarding, and the Trip Flex travel protection add-on. If you purchased an Allegiant vacation package that combined airfare with a hotel stay, the entire bundle clears under this merchant descriptor.

If this charge caught you off guard, check your email accounts for a flight confirmation message from allegiantair.com. Airline charges can also appear when a family member books a trip using your payment card, or when an existing reservation incurs a modification fee. You can verify the transaction by visiting allegiantair.com/manage-travel and entering the passenger last name along with the six-character confirmation code. The website will display an itemized breakdown of airfare and add-on fees.

Under federal Department of Transportation rules (14 CFR Part 259), you can cancel an Allegiant reservation within 24 hours of booking for a full refund to your original payment method, provided the flight was booked at least one week prior to departure. If the charge appears completely unfamiliar and no one in your household booked travel, contact Allegiant Air customer service at allegiantair.com/contactus to locate the traveler details. If the transaction was not authorized by you, call your card issuer immediately to report card fraud and dispute the line item.

1. Review Itinerary Online Go to allegiantair.com/manage-travel to inspect your booking details.
2. Check Trip Flex Add-on Purchasing Trip Flex allows flight changes and cancellations without standard fees.
3. Review Vacation Packages Hotel and rental car bundles booked via Allegiant bill under this single header.

Cancellation Terms and Credit Vouchers

If you need to cancel an Allegiant flight after the initial 24-hour grace period, standard non-refundable tickets do not qualify for a cash return. Instead, Allegiant issues a non-refundable travel voucher valid for 12 months from the original booking date, minus applicable cancellation fees per passenger segment. Travelers who purchased Trip Flex protection can alter dates or cancel up to one hour before departure without standard penalty fees.

If Allegiant cancels or significantly delays your flight schedule and you decline alternative travel accommodations, federal regulations entitle you to a full refund back to your original payment method. Avoid disputing an active reservation with your bank simply to bypass airline refund policies. Initiating an unauthorized chargeback on an active itinerary will lead the airline to cancel your tickets immediately.

Verified sources

Every claim on this page is checked against official sources — open them to confirm before you call your bank.

• Allegiant Air Customer Service Plan and 24-Hour Cancellation https://www.allegiantair.com/customer-service-plan
• DOT Aviation Consumer Protections https://www.transportation.gov/airconsumer