<p style="font-size: medium;" data-start="320" data-end="1075">Passengers planning to travel with pets should carefully review the <strong data-start="407" data-end="505">southwest airlines pet carrier policy before booking their flight. Southwest Airlines allows small, vaccinated cats and dogs to travel in the cabin only when placed in an airline-approved pet carrier. The carrier must be leak-proof, well-ventilated, and small enough to fit completely under the seat in front of the passenger. Pets must remain inside the carrier throughout the journey. Only one pet carrier is permitted per traveler, and availability is limited per flight. Understanding the carrier requirements in advance helps ensure a smooth, compliant, and stress-free travel experience with your pet.