Southwest does allow dogs onboard if they follow their pet policy guidelines. To make a reservation for flight travel with your dog through the Southwest Airlines Pet Policy program, passengers can contact Southwest at 800-435-9792 or 1-844-902-4930 to speak with a representative. Advance reservations, proper carriers, and documentation are required for dogs traveling as carry-on pets. For more information related to pet travel policy and more, visit Airlines Pet Policy.