Southwest Airlines Pet Policy allows small vaccinated domestic cats and dogs to travel in-cabin under the seat in front of you. Pets must be carried in an approved pet carrier and remain inside throughout the flight. The airline charges a pet fare each way, and pets are accepted on a first-come, first-served basis due to limited space. Southwest Airlines does not transport pets in the cargo hold. Passengers should arrive early to complete necessary documentation. The Southwest Airlines Pet Policy ensures comfort and safety for all passengers and their pets, making it easier to travel with your furry companions.