If you’re flying with American Airlines, you can bring a small dog or cat in the cabin on both U.S. and international flights for an extra fee—just make sure they fit comfortably under the seat. As per the American Airlines pet policy, larger pets must travel via American Airlines Cargo on designated routes. Service animals are welcome at no charge. Each passenger can bring one pet carrier, but availability depends on the aircraft, destination, and weather. Be sure to book your pet’s travel in advance!