Spirit Airlines allows passengers to travel with small domesticated pets on all domestic flights, including Puerto Rico and St. Thomas, U.S.V.I. The airline permits the following pets on their aircraft:
- Domestic dogs
- Domestic cats
- Small household birds (except to/from Puerto Rico and the U.S.V.I.)
- Small domestic rabbits (except to/from Puerto Rico and U.S.V.I.) 
Pets are not accepted as checked baggage; they must accompany their owners in the cabin. Spirit Airlines does not allow pets to travel on international flights, except in the case of service dogs.
Pet Policy Cost
Spirit Airlines charges a fee of $110 for pets on all domestic flights. One container can hold a maximum of two pets of the same species, and the fee is $125 per container.
Emotional Support and Service Dogs
As of January 11th, 2021, emotional support animals (ESAN) are required to travel as pets per updated Department of Transportation requirements. However, service dogs are still accepted as trained service or psychiatric service animals. Spirit Airlines only accepts service animals if evidence of training or service is presented, such as identification cards or written documentation.
Carry-On Pet Policy
Pets must travel in a container that is ventilated and fits under the seat in front of the passenger. The maximum size for a pet carrier is 18″L x 14″W x 9″H (45.72cm x 35.56 cm x 22.86cm) . There must be sufficient room for the pet to stand up and turn around in the carrier, which must have a waterproof bottom and adequate ventilation. Spirit Airlines allows a maximum of 4 pet containers in the cabin on all domestic flights, including Puerto Rico and St. Thomas, U.S.V.I.
It is essential to contact Spirit Airlines’ Reservations Center at 1-855-SAVE-555 (1-855-728-3555) or text them at 48763 to add a pet to your reservation. Pets must be at least 8 weeks old and fully weaned. Passengers are limited to one pet carrier each, with up to two pets inside.
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