Everything you need to know about flying with your pet on Southwest Airlines. Updated for 2026 with the latest fees, weight limits, and booking tips.
For full details, see the sections below or visit the complete airline comparison guide.
Southwest Airlines does not allow pets to travel as checked baggage.
Southwest Airlines does not offer cargo or checked baggage service for pets. All pets must travel in the cabin with their owner.
| Type | Fee | Available |
|---|---|---|
| In-Cabin | $125 | Yes |
| Cargo | N/A | No |
Southwest Airlines allows small, vaccinated domestic cats and dogs to travel in the cabin. There are no specific breed restrictions mentioned, but the pet must be able to fit comfortably in a carrier under the seat.
Since Southwest does not transport pets in cargo, there are no temperature restrictions.
Pets are not permitted on international flights or any itinerary that includes an international flight.
Southwest does not allow pets on flights to or from Hawaii. Additionally, pets are not allowed to travel with unaccompanied minors.
Book your pet's spot early as only six pet carriers are allowed per flight.
Your pet carrier will count as your carry-on bag or personal item, so pack accordingly.
Ensure your pet is comfortable in its carrier, as it will need to stay there for the entire flight.
How does Southwest Airlines stack up? Here's a quick look at 3 comparable airlines:
See how Southwest Airlines compares to other airlines for pet travel.
| Airline | In Cabin | Fee | Cargo |
|---|---|---|---|
| Southwest Airlines (current) | Yes | $125 | No |
| American Airlines | Yes | $150 | Yes |
| Delta Air Lines | Yes | $150 | Limited |
| United Airlines | Yes | $150 | Limited |
| JetBlue | Yes | $150 | No |
| Alaska Airlines | Yes | $100 | Yes |
| Spirit Airlines | Yes | $125 | No |
Common questions about traveling with pets on Southwest Airlines.
Our experts can help you navigate Southwest Airlines's pet policy and find the best fares.