If you're planning to fly with your furry companion, understanding the southwest airlines pet policy in cabin is essential. Southwest allows vaccinated cats and dogs to travel in the cabin as long as they meet the copyright size and age requirements. Pets must be at least 8 weeks old, comfortably fit inside an approved leak-proof copyright, and remain stowed under the seat throughout the flight. Only six pet carriers are allowed onboard per flight, so booking early is key. This guide walks you through important rules, what to expect at the airport, seating restrictions, and how Southwest handles pet fares. With proper preparation, flying with your pet on Southwest can be smooth, safe, and stress-free.