If you’re planning to fly with your furry companion, understanding the southwest pet policy in cabin is essential. Southwest Airlines allows small, vaccinated dogs and cats to travel in the cabin as long as they meet the age and carrier requirements. Pets must be at least eight weeks old and kept inside an airline-approved carrier that fits under the seat. A $95 fee applies each way, and only a limited number of pet carriers are permitted per flight. This guide explains the rules, carrier specifications, flight restrictions, and best practices to ensure a stress-free journey. Whether you’re traveling across states or between Hawaiian islands, Southwest offers a simple, comfortable option for pet parents.