A stress-free trip with your pet begins with understanding the southwest airlines pet policy in cabin and all its requirements. Southwest Airlines welcomes small, vaccinated dogs and cats on board, provided they remain in a properly sized carrier that fits beneath the seat. The airline charges a $95 pet fare per way, which is refundable if your booking is canceled. This guide covers essential rules such as age eligibility, carrier dimensions, seating conditions, destination exceptions, and boarding procedures. With limited pet spots available per flight, planning ahead ensures a smooth, comfortable, and safe travel experience for you and your furry companion.