Southwest Airlines Pet Policy allows travelers to bring small, vaccinated cats and dogs in the cabin. Pets must stay in a ventilated, airline-approved carrier that fits under the seat. A pet fare of $95 each way applies. The Southwest Airlines Pet Policy limits one carrier per passenger, with up to two same-species pets inside. Reservations are accepted on a first-come, first-served basis due to limited space. Pets are not allowed in the cargo area. Travelers should arrive early and keep their pets in the carrier during the flight. Service animals are covered under a separate policy with different rules.