In Cabin/Carry-On Pet Fee: $95 one-way per carrier
Maximum Weight Allowed: No weight restriction.
Cargo Area/Checked Baggage Pet Fee: Pets are not allowed in the cargo area or as checked baggage on Southwest Airlines.
Carrier Guidelines: Pets traveling in cabin/carry-on must be transported in soft-sided or hard-sided pet travel carriers that are leak proof and ventilated on at least two sides. The carrier must be large enough for your pet to stand up, turn around and lie down comfortably. The pet carrier must fit under the seat in front of you. The under-seat dimensions are as follows: window seat - 19" L x 14" W x 8.25" H; middle seat - 19" L x 19" W x 8.25" H; aisle seat - 19" L x 14" W x 8.25" H. Southwest Airlines allows only one pet carrier per ticketed Passenger. The carrier may contain two (2) cats or dogs and must be of the same species per carrier. Pets must be secured in the pet carrier at all times while in the gate area, during boarding/deplaning, and they must remain in the carrier for the entire duration of the flight. Failure to follow this requirement may result in denial of transportation of the pet onboard Southwest Airlines.
Pet Policy Details: Visit Southwest Airlines Website