Looking for Spirit Airlines Pet Policy? Spirit allows the carrying of small cats, dogs, and on some routes, they also allow you to bring little household birds and rabbits in the flight cabin. The airline does not accept pets on its international flights except for emotional support and service animals. The pet containers will be counted as your carry-on baggage. Spirit does not ask for a medical health certificate for small pets traveling in the cabin with their masters. However, the animal should be inoffensive, odorless, harmless, and must not seek any kind of attention during the journey. If your…