https://www.flightslineup.com/blog/spirit-airlines-pet-policy/ Spirit Airlines Pet Policy Spirit Airlines allows small domestic dogs, cats, household birds and rabbits to travel in-cabin only (no cargo). Your pet must fit in a soft-sided carrier under the seat (max 18″×14″×9″) and remain inside the carrier for the flight. A maximum of one pet container per guest is allowed, and only certain routes and ages apply. Emotional-support animals are treated as pets, not service animals. For full details and fees, check their official policy. #SpiritAirlines #PetTravel #FlyWithPets #AirlinePetPolicy #PetFriendlyFlights #TravelWithPets #PetCarrier #InCabinPets #FlyingWithPets #PetTravelTips #flightslineup