Airline Pet Policies
Flying with a pet on Allegiant Air is straightforward — but only if you know the rules before you get to the airport. The fees are real, the carrier dimensions are strict, and the number of pet spots per flight is limited.
In this guide
Allegiant Air allows small cats and dogs in the cabin only. There is no cargo option for pets. You pay $100 per pet, per segment — so a round trip costs $200. The carrier must be soft-sided and fit under the seat in front of you. Pets must stay in the carrier for the entire flight.
Want to compare Allegiant with other airlines? Use our pet-friendly flight search to see all policies side by side for your route.
Allegiant charges a flat $100 per pet, per segment.
A segment is one flight leg. If you fly nonstop from Orlando to Las Vegas, that's one segment — $100 each way, $200 round trip. If your itinerary includes a connection, each leg counts separately.
| Trip type | Fee |
|---|---|
| One-way, nonstop | $100 |
| Round trip, nonstop | $200 |
| One-way, one connection | $200 |
| Round trip, one connection each way | $400 |
The fee applies per pet, not per carrier. One carrier with one pet = $100 per segment.
There is no discount for small animals, no waiver for short flights, and no military exemption for the pet fee (though service animals fly free).
Always verify the current fee on allegiantair.com before booking. Airline pet fees change without notice.
Allegiant requires a soft-sided carrier that fits completely under the seat in front of you. Hard-sided carriers are not allowed in the cabin.
| Dimension | Inches | Centimeters |
|---|---|---|
| Height | 9" | 23 cm |
| Width | 16" | 41 cm |
| Length | 19" | 48 cm |
The carrier must fit without forcing it. If you have to push or shove it under the seat, it's too big — and a gate agent can deny boarding for the pet.
The carrier needs to be soft-sided and collapsible enough to compress slightly under the seat. It also needs adequate ventilation on at least two sides. Your pet must be able to sit, stand, and turn around inside it.
Allegiant operates mostly Airbus A319 and A320 aircraft. The under-seat space is roughly consistent, but it can vary slightly by row and seat. Window seats tend to have less under-seat space than aisle seats because of the curved fuselage. If your pet's carrier is close to the size limit, book an aisle seat.
Some carriers marketed as "airline approved" are approved for airlines with larger size limits — they may not fit Allegiant. Measure your carrier against the dimensions above before you travel.
Check dimensions on the Allegiant website before departure, as size limits can be updated.
Allegiant allows domestic cats and dogs only. No birds, rabbits, reptiles, rodents, or exotic animals.
Rules for the animal:
Allegiant does not restrict specific dog breeds in its published policy, but the practical constraint is size: if your dog fits in the carrier and the carrier fits under the seat, you're eligible.
Allegiant does not transport pets in cargo. If your pet can't travel in the cabin, it can't travel on Allegiant. This is actually one of the better aspects of their policy — your pet is always with you, never in the hold.
Allegiant limits the number of pets per cabin. The exact number isn't published, but it fills up. If you're traveling during peak season or on a busy route, add your pet to the booking as early as possible. Don't assume there's space.
You can add a pet during booking or after, through your existing reservation.
Call Allegiant customer service at 1-702-505-8888. Have your confirmation number ready. This is also the right channel if you're having trouble adding the pet online.
Add your pet as early as possible. Pet spots are limited per flight and fill up on popular routes. Adding your pet at the gate is not possible.
Allegiant is primarily a domestic US carrier with some service to Mexico and the Caribbean. The pet-in-cabin policy applies to domestic US routes. If you're flying to an international destination, check the specific route, as international rules and entry requirements for animals are separate from the airline's own policy.
For any trip outside the US, you'll also need to look at the destination country's import requirements: health certificates, vaccinations, microchipping, and in some cases quarantine. Our pet passport guide covers those steps in detail.
Emotional support animals (ESAs) are no longer accepted on Allegiant Air.
In January 2021, the US Department of Transportation issued a final rule allowing airlines to treat ESAs as pets rather than service animals. Allegiant updated its policy accordingly. If you previously flew with an ESA on Allegiant, those rules no longer apply.
Trained service animals (dogs only, per the DOT rule) are still accepted. To bring a service animal, you need to complete Allegiant's Service Animal Air Transportation Form at least 48 hours before your flight.
Service animals fly free. They are not subject to the pet fee.
If you're traveling with a psychiatric service dog, the same process applies — the animal must be trained to perform specific tasks related to a disability, not just provide emotional comfort.
Yes. Allegiant allows small cats and dogs in the cabin on most domestic routes. There is no cargo option — if your pet doesn't fit in a soft-sided carrier under the seat in front of you, it can't fly on Allegiant.
Allegiant charges $100 per pet, per segment. A nonstop round trip costs $200. If your itinerary includes a connection, each leg is charged separately.
Allegiant requires a soft-sided carrier with maximum dimensions of 9" H × 16" W × 19" L (23 × 41 × 48 cm). The carrier must fit completely under the seat in front of you. Hard-sided carriers are not permitted in the cabin.
No. Allegiant does not offer pet transport in cargo. Pets can only travel in the cabin. If your pet doesn't qualify for cabin travel, Allegiant is not an option.
During booking, select "Add a pet" in the extras step. After booking, go to "Manage Travel" on allegiantair.com and add the pet to your existing reservation. You can also call Allegiant at 1-702-505-8888. Add your pet as early as possible — spots are limited per flight.
No. Allegiant stopped accepting emotional support animals in 2021, following the DOT rule change. Only trained service dogs (with the required documentation submitted 48 hours before departure) are exempt from the pet fee and policy.
Before you head to the airport with your pet:
Compare Allegiant with every other airline that flies your route. Filter by your pet's weight, species, and destination — and see which carriers actually allow your pet in cabin.
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