Allegiant Airlines Manage Booking: Change Flights, Seats & Bags

Allegiant Air handles flight reservations through its self-service Manage Travel portal, accessible on both the official website and the mobile app. Through this portal, passengers can retrieve itineraries, modify travel dates or flight times, choose seats, purchase carry-on and checked luggage, add Priority Access, or cancel itineraries.

Because Allegiant is an ultra-low-cost carrier, policies regarding change fees, credit issuance, and optional service pricing are strictly tied to fare rules, purchase timing, and optional products like Trip Flex.

Editorial & Transparency Notice: This page is an independent informational guide. It is not affiliated with, endorsed by, or part of Allegiant Air or Allegiant Travel Company. Reservation modifications, payments, cancellations, and seat changes must ultimately be completed through Allegiant’s official website (allegiantair.com) or the official Allegiant mobile app.

Allegiant Airlines Manage Booking at a Glance

How to Access Your Allegiant Booking

To view or modify an existing reservation, use Allegiant's verified reservation lookup tools:

1. Go to the Official Portal: Navigate to Allegiant’s homepage and click on the Manage Travel tab located in the main navigation menu.
2. Enter Lookup Details: Input the passenger's First Name, Last Name, and the 6-character alphanumeric Confirmation Code. Alternatively, log in using your Allegiant account credentials (email and password) if the trip was booked under a registered profile.
3. Retrieve Your Trip: Click the search button to pull up your complete booking summary.
4. Select Your Action: Click on the designated action button, such as "Change Flights," "Add Seats," "Add Bags," or "Cancel Booking."
5. Review Summary & Price Differences: If modifying flights, seats, or luggage, review the cost breakdown, which displays applicable fare differences, service fees, or credit amounts.
6. Submit Payment & Confirm: Complete the transaction using an approved debit/credit card or applied travel credit.
7. Save Updated Documentation: Download or print your updated itinerary confirmation and keep a copy for your records.

What Can You Do With Allegiant Manage Travel?

The Manage Travel suite centralizes virtually all pre-departure adjustments so travelers can avoid calling support desks.

View Your Trip Details

You can review departure and arrival times, origin and destination airport terminal details, flight numbers, aircraft type, and an itemized breakdown of past payments, taxes, and purchased ancillaries.

Change Your Flight

If your schedule shifts, you can swap your flight to a different departure time or routing. Flight modifications remain subject to seat availability, fare differences, and standard tariff rules.

Change Your Travel Date

Passengers can shift their trip dates forward or backward. If the new flight costs more than the original fare, the customer pays the fare difference. If the fare is lower, residual credit rules depend on whether Trip Flex was part of the original ticket.

Select or Change Seats

Manage Travel allows you to view the aircraft seat map and choose aisle, window, standard middle, or extra-legroom seats. If you did not choose a seat at initial checkout, you can purchase one up until online check-in closes.

Add Baggage

Allegiant charges for both carry-on and checked luggage. Adding baggage via Manage Travel prior to arriving at the airport provides substantial savings compared to paying at the ticket counter or departure gate.

Add Priority Access

Priority Access allows passengers to board the aircraft early, dedicated lane access at select airport check-in counters, and priority boarding group placement. This can be added to your itinerary online if slots remain open for your flight.

Cancel Your Trip

If you can no longer travel, initiating a cancellation online calculates whether you qualify for an original-payment refund or an Allegiant travel voucher, taking into account cancellation deadlines and Trip Flex status.

Manage Other Eligible Travel Products

For reservations bundling third-party components like rental cars or hotel stays, Manage Travel displays relevant voucher codes, pickup instructions, and itinerary links.

How to Change an Allegiant Flight

Changing a flight online depends heavily on the fare rules associated with your ticket:

• Step 1: Retrieve the reservation using your confirmation code and last name.
• Step 2: Click Change Flight next to the specific flight segment you wish to alter.
• Step 3: Select a new departure date, origin, or destination.
• Step 4: Compare available flight options and view real-time fare differences.
• Step 5: Review the final pricing breakdown. This screen highlights any applicable change fees (waived if Trip Flex was purchased) along with additional ticket costs.
• Step 6: Authorize the card payment or confirm receipt of an airline voucher if applicable, then save your updated flight confirmation.

Policy Note: Standard tickets without Trip Flex cannot be modified within 7 days of departure under standard terms, and non-Trip Flex modifications typically incur per-passenger, per-segment change fees. Verify the exact amounts displayed on Allegiant’s screen before finalizing.

How to Change Your Allegiant Seat

Seats on Allegiant are unbundled and sold à la carte. If you skipped seat selection during initial booking, the airline’s automated system will randomly assign you a seat at no extra cost when online check-in opens 24 hours prior to departure.

If you prefer a specific location (such as window, aisle, or extra legroom):

1. Access your reservation in Manage Travel.
2. Click Modify Seats.
3. Click on the interactive seat map to select your preferred available seats for each passenger.
4. Review the seat pricing (rates vary based on route distance and seat category).
5. Proceed to payment and save your updated boarding details.

Note: Allegiant does not guarantee that groups or families traveling together on unassigned fares will sit together, making pre-selection via Manage Travel advisable for families with young travelers.

How to Add or Change Baggage on an Allegiant Booking

Every Allegiant ticket includes only one personal item that must fit under the seat in front of you. Personal items exceeding dimensions, overhead carry-on bags, and checked luggage carry separate fees.

To add bags after booking:

1. Log into Manage Travel.
2. Navigate to the Baggage section.
3. Select the number of checked bags (up to carrier weight limits, typically 40 lbs per standard bag) and carry-on bags for each passenger on each flight leg.
4. Pay for the baggage online using your credit or debit card.

Cost Warning: Purchasing baggage through Manage Travel before arriving at the airport is significantly less expensive than paying at the airport counter or gate. Once luggage is paid for, baggage fees are non-refundable.

How to Cancel an Allegiant Reservation

If you must cancel your flight, the outcome depends on federal regulations and fare terms:

1. The 24-Hour Cancellation Rule (U.S. DOT)

Per U.S. Department of Transportation mandates and Allegiant policy, if you booked your flight directly with Allegiant at least 168 hours (7 days) prior to departure, you may cancel the reservation within 24 hours of purchase for a full refund back to your original payment method, free of penalties.

2. Standard Non-Refundable Cancellations

Outside the 24-hour window, standard Allegiant fares are strictly non-refundable to original payment methods. If you cancel a standard ticket:

• Cancellations made at least 7 days prior to departure may result in a non-transferable Allegiant travel voucher, minus standard per-passenger cancellation fees.
• Cancellations attempted inside 7 days before departure on standard bookings typically forfeit the entire value of the itinerary.

3. Airline-Initiated Cancellations

If Allegiant cancels your flight or implements a significant schedule change and cannot accommodate you on an acceptable alternative, federal regulations mandate that you are entitled to a full refund back to your original form of payment, even on non-refundable tickets.

Allegiant Trip Flex and Booking Changes

Trip Flex is an optional travel protection add-on that can only be purchased at the time of initial booking. It cannot be added retroactively through Manage Travel.

• What It Covers: Trip Flex allows you to make a one-time change to your flight date, flight time, or destination, or cancel your itinerary without paying standard airline change or cancellation fees.
• Time Restrictions: Trip Flex modifications or cancellations must be completed at least 1 hour prior to scheduled departure for flight-only bookings, or at least 72 hours prior to scheduled departure for hotel/air vacation packages.
• What It Does NOT Cover: Trip Flex is not travel insurance. It does not waive airfare differences if the new flight is more expensive. If you cancel a booking protected by Trip Flex, the balance is issued as an Allegiant travel voucher, not a cash refund to your credit card. The cost of the Trip Flex add-on itself is non-refundable.

I Can't Find My Allegiant Reservation — What Should I Do?

If you receive an error stating your reservation cannot be located, run through this troubleshooting checklist:

• Verify the Confirmation Code: Ensure you are entering Allegiant’s 6-character alphanumeric code, not a third-party ticketing reference.
• Check Name Spelling: Enter the passenger's legal last name exactly as listed on government photo ID and original confirmation paperwork. Do not include titles (Mr., Mrs.) unless they were mistakenly attached to the last name field.
• Inspect the Confirmation Email: Search your email client (including spam/junk folders) for messages from @allegiantair.com.
• Log In to Your Profile: If you have an Allegiant account, log in directly; your upcoming trips should populate under your trip history.
• Check Banking Statements: Confirm that your card was actually charged and the purchase was finalized.
• Contact Allegiant: If the reservation remains missing, reach out to Allegiant Customer Care at (702) 505-8888 with your flight date, departure airport, and payment details ready.

Can I Manage an Allegiant Booking Made Through a Third Party?

Allegiant sells flights primarily through its own website and mobile app. However, some travelers book package vacations through third-party platforms (such as online travel agencies or corporate tools).

• If the third party issued a standard Allegiant 6-character confirmation code, you can generally enter Manage Travel on Allegiant's website to add bags, select seats, or view the itinerary.
• If you need to change dates, alter routing, or process a cancellation, third-party rules apply. You will frequently be required to contact the original booking agency directly to adjust or reissue the ticket.

Allegiant Manage Booking vs. Online Check-In

While both tools are located on Allegiant's digital platforms, they serve distinct purposes across your travel timeline:

Common Allegiant Manage Travel Problems and Solutions

• Problem: Change Option Is Greyed Out or Unavailable
  • Possible Reason: You are within 7 days of travel without Trip Flex, or the flight has entered airport control.
  • What to Do: Check your ticket rules; if urgent, call customer support at (702) 505-8888.
• Problem: Cannot Add Baggage Online
  • Possible Reason: The flight is within 45 minutes of departure or the manifest is locked.
  • What to Do: Proceed to the airport counter to pay baggage fees in person.
• Problem: Preferred Seats Appear Blocked
  • Possible Reason: Seats are already purchased, reserved for operational weight and balance, or held for passengers with disabilities.
  • What to Do: Select an alternative seat, or wait for automated seat assignment at check-in.
• Problem: Unexpected Charge During Changes
  • Possible Reason: Higher fare bucket on the new flight or non-waived change fees.
  • What to Do: Review the cost breakdown line by line before clicking confirm.
• Problem: Website or App Glitch
  • Possible Reason: Browser caching or app version incompatibility.
  • What to Do: Clear your browser cache, try an incognito window, or use the Allegiant mobile app.

When Should You Contact Allegiant Directly?

While Manage Travel handles routine tasks, contact Allegiant Customer Care at (702) 505-8888 under the following conditions:

• Your reservation cannot be retrieved online despite confirmed credit card charges.
• You require specific accessibility services, medical device clearances, or service animal documentation.
• Your flight was canceled or rescheduled by the airline, and the automated rebooking portal offers no acceptable options.
• You need to correct a misspelled passenger name.
• You need to apply an existing travel credit that generates checkout errors.

Important Things to Check Before Confirming a Booking Change

Before clicking "Confirm" on any modification in Manage Travel, review this checklist:

• Passenger Legal Names: Accurately match government photo IDs.
• Travel Dates: Confirm departure day and arrival day.
• Origin & Destination Airports: Double-check secondary airport codes.
• Departure Times: Note AM vs. PM flights.
• Seat Selection: Confirm your chosen seat row and letter.
• Baggage Allowance: Verify paid carry-on and checked bag counts.
• Fare Difference & Fees: Check the itemized transaction total.
• Cancellation/Credit Conditions: Review voucher expiration terms.
• Updated Confirmation: Ensure a new confirmation receipt is delivered to your email inbox.

Internal Linking Suggestions

• Allegiant Airlines Check-In Guide
• Allegiant Airlines Flight Status Tracker
• Allegiant Airlines Customer Care & Phone Support
• Allegiant Airlines Baggage Allowance & Fees
• Allegiant Airlines Seat Selection Guide
• Allegiant Airlines Cancellation & Refund Policy
• Allegiant Airlines Flight Change Policy

Sources / Official References

• Allegiant Air Official Website – Flight booking and Manage Travel portal
• Allegiant Air Customer Service Plan – Operational commitments and cancellation terms
• Allegiant Air FAQs & Help Center – Policies on seating, baggage, and Trip Flex
• U.S. Department of Transportation Aviation Consumer Protection – Federal 24-hour cancellation rules and refund mandates

Last Reviewed Date

Last reviewed: September 24, 2026

Content Accuracy Notes

• Pricing Variability: Baggage fees and seat selection prices vary by route, travel season, and time of purchase; readers are instructed to review real-time amounts on Allegiant's screen.
• Trip Flex Terms: Explicitly documented that Trip Flex does not offer cash refunds upon cancellation and cannot be added after initial ticket purchase.
• Federal Rules: Correctly delineates between DOT refund mandates (applicable to airline cancellations and 24-hour windows) and Allegiant's discretionary travel voucher rules for voluntary cancellations.