Southwest airlines do not allow pets in their cargo hold. You may only take very small dogs or cats with you. They will not allow any other animals. Your pet must be calm and not make a fuss during the flight. You may want to bring one of their favorite toys or blankets, or treats with you.
Airline Pet Policy Southwest Airlines - Fly Your Dog or Cat Safely
There are different , and airline regulations differ. Southwest only allows small dogs and cats to travel with you, and only one carrier. Other airlines have different rules, so you may want to check with different ones.
Pet Carrier - Southwest The Store
Southwest Airlines does not accept for transportation therapy dogs or exotic animals. Please note that Customers traveling with an assistance animal or an emotional support animal may not sit in an emergency exit seat.
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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.