<p style="font-size: medium;" data-start="982" data-end="1065"><br data-start="1100" data-end="1103" />If you&rsquo;re planning to bring your cat or dog onboard, understanding the southwest airlines pet carrier policy is essential. According to <span class="hover:entity-accent entity-underline inline cursor-pointer align-baseline">Southwest Airlines</span> guidelines, pets must travel inside a soft-sided or hard-sided carrier that fits completely beneath the seat. The carrier must not exceed 18.5 inches long, 13.5 inches wide, and 9.5 inches high. It should also be secure, ventilated, and leak-resistant. A refundable $95 pet fare applies per carrier each way. With only six pet carriers allowed per flight, securing your reservation early ensures a smoother travel experience.