Traveling with a beloved pet can be a joyous experience, but it requires careful planning, especially when it comes to airline regulations. For pet owners choosing Southwest Airlines, understanding the specific requirements for their pet carrier is crucial for a smooth journey. This guide delves into everything you need to know about selecting the ideal pet carrier that meets Southwest’s guidelines, ensuring comfort and safety for your four-legged companion.

Understanding Pet Carrier Types for Air Travel
When preparing for air travel with your pet on Southwest, you’ll encounter a few primary pet carrier types, each with distinct advantages and considerations. While the general categories include soft-sided, hard-sided, backpack, and wheeled carriers, the critical factor for airline travel is whether they adhere to under-seat dimensions and specific airline policies.
Soft-Sided Pet Carriers
Soft-sided carriers are a popular choice for in-cabin pet travel due to their flexibility. They are typically made from lightweight fabrics like nylon or mesh, allowing them to conform slightly to under-seat spaces. Their pliability makes them easy to store when not in use and often comes with multiple mesh windows for ventilation, giving your pet a view and ample airflow. These carriers are generally comfortable for pets and easy for owners to carry, often featuring shoulder straps or handles. However, their less rigid structure means they might offer slightly less protection against external impacts compared to hard-sided options.
Hard-Sided Pet Carriers
Hard-sided carriers, usually constructed from durable plastic or metal, provide a robust and secure environment for your pet. They maintain their shape, offering consistent space and protection. While less common for in-cabin travel due to their rigid dimensions, specific compact models can still meet airline requirements. Their sturdiness makes them easy to clean and sanitize. The primary drawback for airline use is their inflexibility, meaning even a slightly oversized hard carrier will not fit under the seat, unlike a soft-sided one that can sometimes be gently compressed.
Backpack Pet Carriers
For hands-free convenience, backpack pet carriers are an appealing option, particularly for smaller pets. These carriers allow you to carry your pet on your back, which can be ideal for navigating busy airports. Many backpack designs feature ample ventilation and sometimes even expandable sections for extra space when stationary. The key challenge with backpack carriers for airline travel is ensuring they meet the specific dimensions for under-seat stowage. While practical for general travel, the height of some backpack carriers might exceed Southwest’s requirements, necessitating careful measurement.
Wheeled Pet Carriers
Wheeled pet carriers offer the ultimate convenience for transporting heavier pets or for owners who prefer not to carry weight. They resemble rolling luggage, allowing you to pull your pet effortlessly through the terminal. Like backpack carriers, the critical consideration for air travel is size. Most wheeled carriers are designed for larger pets or as cargo options and typically do not fit under an airline seat. However, compact wheeled carriers that can collapse or detach from their wheel base to meet under-seat dimensions might be suitable for Southwest flights.
Choosing Your Southwest Airlines Pet Carrier
Selecting the right pet carrier is paramount for a stress-free experience when flying with Southwest Airlines. Beyond general pet carrier types, specific criteria must be met to ensure compliance and your pet’s comfort and safety.
Dimensions and Fit
Southwest Airlines has strict size requirements for in-cabin pet carriers, as they must fit securely under the seat in front of you. The maximum allowable dimensions for pet carriers are generally 18.5 inches (length) x 13.5 inches (width) x 9.5 inches (height). It is vital to measure your carrier accurately, keeping in mind that soft-sided carriers can slightly compress, which can be an advantage. Your pet must also be able to stand up, turn around, and lie down in a natural position inside the carrier without touching the top. This ensures their well-being throughout the flight, preventing discomfort and stress.
Material and Construction
The material of your pet carrier contributes significantly to your pet’s comfort and the carrier’s durability. Southwest requires carriers to be leak-proof and well-ventilated.
- Ventilation: Look for carriers with ample mesh windows or vents on at least three sides (ideally four) to ensure continuous airflow. Good ventilation is crucial to prevent overheating and to keep your pet calm.
- Leak-Proof: A leak-proof bottom is non-negotiable. This prevents any accidents from soiling the aircraft cabin. Many carriers come with removable, washable pads, which add comfort and make cleaning easy.
- Durability and Safety: The carrier should be made from sturdy, non-toxic materials. Zippers should be robust and preferably self-locking or have clips to prevent accidental escapes. A secure latch or locking mechanism is essential for both hard and soft-sided carriers.
Essential Features for Airline Travel
Beyond the basic requirements, certain features can enhance your pet’s travel experience and your convenience:
- Comfortable Interior: A soft, removable, and washable fleece or faux fur pad can make the carrier more inviting for your pet.
- Multiple Entry Points: Carriers with top and side openings offer easier access for placing your pet inside or comforting them.
- Pockets for Essentials: External pockets are handy for carrying treats, waste bags, vaccination records, or small toys.
- Adjustable Shoulder Straps or Handles: Padded straps make carrying your pet through the airport more comfortable.
- Airline-Approved Label: While not mandatory, many reputable pet carrier brands market their products as “airline-approved,” which can offer peace of mind, though you should always double-check the specific dimensions for Southwest.
Brand Reputation
When selecting a pet carrier for air travel, considering reputable brands is often a wise decision. Established brands frequently design carriers with airline regulations in mind, offering products known for their durability, safety features, and pet comfort. While specific product recommendations are outside this scope, looking for brands with positive customer reviews and a history of producing reliable pet travel gear can guide your choice. Always verify that any carrier, regardless of brand, explicitly meets Southwest’s current size and feature requirements before purchase.
A Guide to Southwest Airlines’ Pet Policy
Beyond the carrier itself, understanding Southwest’s overall pet policy is crucial for a seamless travel day. Familiarizing yourself with these regulations can prevent unexpected issues at the airport.
Southwest Airlines welcomes small, vaccinated domestic cats and dogs aged at least eight weeks old to travel in the cabin on domestic flights. Pets are not permitted on international flights or flights to and from Hawaii, with the exception of inter-island Hawaiian flights where a different fee may apply.
Booking and Fees
It is highly recommended to make a pet reservation as early as possible. Southwest limits the number of pet carriers to six per flight, and availability operates on a first-come, first-served basis. The fee for traveling with a pet is $125 each way for domestic flights. This fee is typically paid at the airport ticket counter.
During Your Journey
Your pet must remain inside its carrier at all times while in the gate area, during boarding and deplaning, and throughout the entire flight. The carrier must be stowed under the seat in front of you. Pets are not allowed to sit on your lap, and for their safety and the comfort of other passengers, they must not exhibit disruptive behavior such as excessive barking, scratching, or growling. A pet carrier is considered either a personal item or a carry-on item, so plan your other luggage accordingly.
Important Notes
- Emotional Support Animals: Southwest Airlines does not recognize emotional support animals as service animals, and they are subject to the standard pet fee and carrier requirements.
- Unaccompanied Minors: Unaccompanied minors are not permitted to travel with pets.
- Seat Restrictions: You cannot occupy an exit row seat or a seat without under-seat space in front of it (such as the first row) when traveling with a pet.
- Pet Strollers/Crates: For reservations booked on or before May 27, 2025, customers traveling with a pet may check a pet stroller or crate for free. For reservations booked on or after May 28, 2025, standard checked bag fees will apply to pet strollers. Southwest does not assume liability for damage to pet strollers.
“Preparation is key when flying with your pet. Knowing the airline’s rules inside and out, especially carrier dimensions and behavior expectations, ensures a calm journey for both you and your furry companion.” – Dr. Sarah Miller, Veterinary Travel Specialist
Conclusion
Choosing the right Southwest Airlines Pet Carrier is a critical step in ensuring a safe, comfortable, and compliant travel experience for your cherished pet. By prioritizing the exact dimensions, sturdy and well-ventilated materials, and essential safety features, you can confidently prepare for your flight. Always remember to book your pet’s spot early due to limited availability and familiarize yourself with all aspects of Southwest’s pet policy. With careful planning, you and your pet can look forward to many memorable adventures together.
What are your top concerns when selecting an airline-approved pet carrier for your next trip?
Frequently Asked Questions
Can I use any pet carrier on Southwest Airlines?
No, Southwest Airlines has specific requirements for pet carriers, including maximum dimensions (18.5″ L x 13.5″ W x 9.5″ H), and it must be leak-proof, well-ventilated, and fit under the seat in front of you. Your pet must also be able to stand, turn around, and lie down comfortably inside.
Is a soft-sided or hard-sided carrier better for Southwest flights?
Both soft-sided and hard-sided carriers are permitted. Soft-sided carriers are often preferred as they can slightly compress to fit under the seat, but hard-sided carriers that meet the exact dimensions are also acceptable and provide more rigid protection.
How many pets can I bring in one carrier on Southwest?
You can bring up to two pets of the same species in a single carrier, provided they can comfortably stand, turn around, and lie down without touching the top or sides.
What is the fee for bringing a pet on Southwest Airlines?
The fee for bringing a pet in the cabin on a Southwest Airlines domestic flight is $125 each way. This fee is paid at the airport ticket counter.
Can I take my pet on an international Southwest flight?
No, Southwest Airlines only allows pets on domestic flights. Pets are also not permitted on flights to or from Hawaii, with the exception of inter-island Hawaiian flights.
Do emotional support animals fly free on Southwest Airlines?
No, as of current policy, emotional support animals are treated as regular pets and are subject to the standard pet fee and carrier requirements on Southwest Airlines.
What happens if my pet is disruptive during the flight?
If your pet exhibits disruptive behavior, such as excessive barking, scratching, or growling, Southwest Airlines reserves the right to deny boarding or remove the pet from the flight for the safety and comfort of other passengers and crew.