Your Ultimate Guide to Southwest Airlines Approved Pet Carriers

Traveling with your beloved pet can be a joyous experience, but navigating airline regulations is crucial for a smooth journey. For Southwest Airlines passengers, understanding the specific requirements for pet carriers isn’t just a recommendation—it’s a necessity. Choosing the right Southwest Airlines approved pet carrier ensures both your furry friend’s safety and comfort, and guarantees a hassle-free boarding process. This comprehensive guide will equip you with all the knowledge needed to select the perfect carrier, adhere to Southwest’s policies, and make your next trip with your companion a breeze.

Types of Pet Carriers for Air Travel

When preparing for air travel with your pet, the type of carrier you choose is the first and most critical decision. While there are various styles available, not all are suitable for in-cabin travel on Southwest Airlines.

Soft-Sided Pet Carriers

Soft-sided pet carriers are overwhelmingly the preferred choice for in-cabin travel on most airlines, including Southwest. Their inherent flexibility allows them to conform more easily to the confined space under an airplane seat.

• Advantages: These carriers are typically lightweight and feature multiple mesh windows, providing excellent ventilation and allowing your pet to see their surroundings. Many models come with padded shoulder straps or handles, making them comfortable to carry. Their pliable nature is a significant plus, as they can often be gently compressed to fit into tighter under-seat areas, even if their stated dimensions are slightly above the strict airline limits.
• Disadvantages: While offering comfort and flexibility, soft-sided carriers may provide less rigid protection against impacts compared to their hard-sided counterparts. However, for in-cabin travel where the carrier remains with you, this is generally less of a concern.
• Why They Are Preferred: The primary reason soft-sided carriers are favored for in-cabin travel is their adaptability. They can often squeeze into the designated under-seat space, which is typically a tight fit for any carrier.

Hard-Sided Pet Carriers

Hard-sided pet carriers, while sturdy and protective, are generally not suitable for in-cabin travel on Southwest Airlines or most other major carriers.

• Why They Are Typically Not Suitable: The rigid structure of hard-sided carriers makes them unable to be compressed, meaning they must precisely meet the dimensions of the under-seat space. This rarely happens, as most hard-sided carriers are designed for cargo travel, which Southwest does not offer for pets. Their inflexible nature usually makes them too large or too rigid to fit comfortably under an airplane seat.
• Mentioning Their Use: It’s important to note that Southwest Airlines explicitly states they do not transport pets in the cargo hold. Therefore, hard-sided carriers are generally irrelevant for Southwest pet travel unless they somehow perfectly match the strict in-cabin dimensions and flexibility requirements, which is highly unlikely.

Comparing Pet Carrier Types for Southwest Flights

To highlight the differences and aid your decision-making, here’s a comparison table focusing on features relevant to Southwest Airlines’ in-cabin pet policy:

Your Essential Buying Guide for Southwest Airlines Pet Carriers

Choosing an airline-approved pet carrier for Southwest Airlines requires meticulous attention to detail. The airline has specific guidelines that must be followed precisely to ensure your pet’s comfort and compliance with regulations.

Understanding Southwest’s Strict Dimensions

Our Picks for the Best Pet Carrier in 2026 As an Amazon Associate I earn from qualifying purchases.
Num	Product	Action
1	Amazon Basics 2-Door Top-Load Hard-Sided Dogs, Cats Pet Travel Carrier, Gray & Blue, 22.8"L x 15.0"W x 13.0"H
2	Dog Sling Carrier, Puppy Carrier Purse with Storage Pocket, Hand-Free Dog Carrier Sling for Carry Small Dogs and Cats, Puppy Essentials (Purple)
3	Henkelion Cat Carriers Dog Carrier Pet Carrier For Small / Medium Cats Dogs Puppies (Up To 15lbs), TSA Airline Approved Small Dog Carrier Soft Sided, Collapsible Waterproof Travel Puppy Carrier - Grey
4	Pet Carrier for Large Cats, Soft-Sided Cat Carrier for Medium Big Cats and Puppy up to 20lbs, Washable Dog Carrier Privacy Protection for Home Outdoor Travel
5	Cat Carrying Case Pet Dog Carrier Soft-Sided Cat Bag Airline Approved, Pet Travel Carrier Up to 15 Lbs, Collapsible Cats Carrier Dog Carrier for Medium Small Cats Dogs(17x11x11 Green)
6	Lekereise Cat Backpack Carriers, Dog Carrier Backpacks with Breathable Mesh for Small Medium Cats Dogs Puppy Up to 17 Lbs, Pet Foldable Carrying Backpack Ventilated for Travel Hiking Collapsible
7	Texsens Innovative Traveler Bubble Backpack Pet Carriers for Cats and Dogs (Black)
8	Top and 2 Sides Expandable Large Cat Carrier 18x13.5x9.5, TSA Airline Approved Dog Carriers for Large Dogs, Soft-Sided Pet Carrier with Self-Locking Zippers for Kitten,Rabbit,Puppy, Black White
9	Henkelion Cat Carriers Dog Carrier Pet Carrier for Small / Medium Cats Dogs Puppies (Up To 15lbs), TSA Airline Approved Small Dog Carrier Soft Sided, Collapsible Waterproof Travel Puppy Carrier -Black
10	Morpilot Cat Carrier - Cat Carrier Soft for Medium or Large Cats up to 20lbs, with Dual-Sided Cushion, Secure Buckle and Foldable Bowl, Dog Carriers for Small Dogs - Pet Carrier (Dark Gray)

The most critical aspect of choosing a carrier is its size. Southwest Airlines has precise dimensions for pet carriers that must fit under the seat in front of you.

• Southwest Branded Carrier: If you opt for Southwest’s own branded pet carrier, it measures 17″ (L) x 10″ (W) x 9.5″ (H) and is always permitted.
• Other Approved Carriers: For non-Southwest branded carriers, the maximum dimensions are 18.5″ (L) x 13.5″ (W) x 8.5″ (H). It’s vital to pay close attention to the height (8.5 inches), as this is often the most restrictive measurement for under-seat storage.
• Importance of “Fitting Under the Seat”: Regardless of the exact measurements, the carrier must fit comfortably under the seat without impeding the aisle or your ability to move. Furthermore, your pet must be able to stand up, turn around, and lie down comfortably inside the carrier. If your pet cannot do this, the carrier is too small, even if it meets the external dimensions.
• How to Accurately Measure: Before purchasing, measure your pet while they are standing (from nose to tail, and from the top of their head to the ground) and lying down. Then, measure the carrier’s length, width, and especially its height from the outside. Remember that soft-sided carriers can offer some flexibility in height.

Key Features to Look For

Beyond dimensions, several features contribute to a safe and comfortable travel experience for your pet.

• Material: Opt for carriers made from durable, high-quality, non-toxic materials. Rip-stop mesh and strong fabric are ideal. The bottom of the carrier should be leak-proof and easy to clean in case of accidents.
• Ventilation: Ample mesh windows on multiple sides are crucial for proper airflow, preventing your pet from overheating and reducing anxiety by allowing them to see out.
• Security: Ensure the carrier has secure, self-locking zippers to prevent accidental escapes. An interior leash tether is also a valuable feature to keep your pet safely contained even if a door is briefly opened.
• Comfort: Look for carriers with a soft, removable, and washable fleece or padded mat inside. This provides cushioning and warmth, making the journey more pleasant for your pet. An absorbent lining is also beneficial.
• Portability: Padded handles and an adjustable shoulder strap can significantly ease the burden of carrying your pet through the airport. A luggage sleeve that slides over the handle of your rolling suitcase is a highly convenient feature.

Important Southwest Airlines Pet Policies

Understanding Southwest’s overall pet policy is just as important as selecting the right carrier.

• Eligible Pets: Southwest Airlines permits small, vaccinated domestic cats and dogs aged at least eight weeks old to travel in the cabin. They do not accept other types of pets.
• Fees: There is a non-refundable pet fare of $95 each way. This fee is paid at the airport ticket counter.
• Booking: Space for pets is limited to six carriers per flight. It is highly advisable to make your pet’s reservation as far in advance as possible by calling Southwest Airlines directly, as spots are allocated on a first-come, first-served basis.
• Restrictions: Pets are not allowed on international flights or flights to/from Hawaii. Southwest does not transport pets in the cargo hold. Additionally, passengers traveling with pets may not sit in bulkhead rows or exit rows. Unaccompanied minors are also not permitted to travel with a pet. Your pet must remain fully inside the carrier, with the carrier stowed under the seat, at all times while in the gate area, during boarding/deplaning, and throughout the entire flight.
• Carrier as Carry-on: Your pet carrier will count as either your personal item or your carry-on bag, meaning you cannot bring an additional third item.

Top Pet Carrier Brands for Southwest Travelers

While Southwest doesn’t officially endorse third-party brands, some carriers consistently receive positive feedback from travelers for meeting the airline’s requirements.

Petsfit Expandable Pet Carrier

The Petsfit Expandable Pet Carrier is a popular choice among pet owners. Its key feature is the dual expandable, scratch-resistant mesh sides, which offer extra room for your pet during layovers or while waiting at the gate. This flexibility is particularly useful as it allows your pet to stretch out without leaving the carrier, then zips up to comply with under-seat dimensions during flight. It’s also often collapsible, with removable rods that provide extra “give” when fitting under the seat.

EliteField Deluxe Soft-Sided Airline-Approved Dog & Cat Carrier

The EliteField Deluxe Soft-Sided Carrier is a highly-rated option known for its sturdy yet flexible construction. It typically features good ventilation, comfortable carrying handles, and a removable fleece bed. Many models are designed with airline specifications in mind, making them a reliable choice for meeting Southwest’s dimensions. Its durability and practical design make it a favorite for frequent flyers.

Sherpa Original Deluxe Carrier

The Sherpa Original Deluxe Carrier is another well-regarded brand frequently mentioned in pet travel communities. Known for its soft-sided flexibility, this carrier often comes with a spring wire frame that allows the rear of the carrier to be pushed down several inches to conform to under-seat requirements. It offers good ventilation, a comfortable interior, and a seatbelt/luggage strap, making it a functional and adaptable choice for Southwest travelers.

“The crucial aspect of flying with your pet on Southwest isn’t just the carrier’s measurements, but its ability to adapt to the unpredictable under-seat space and keep your pet calm and comfortable throughout the journey.” – Sarah Jenkins, Professional Pet Travel Consultant

Conclusion

Flying with your pet on Southwest Airlines can be a stress-free and enjoyable experience when you’re well-prepared. The cornerstone of this preparation is selecting an airline-approved pet carrier that strictly adheres to Southwest’s specific dimensions and policies. Prioritize soft-sided carriers for their flexibility, ensure your pet can move comfortably inside, and always double-check the latest regulations on Southwest’s official website before your flight. By understanding the guidelines, choosing the right carrier, and making your pet’s reservation in advance, you’re setting the stage for a successful and memorable journey together. What steps will you take to ensure your pet’s carrier meets every requirement for your next Southwest flight?

Frequently Asked Questions

Can I bring a hard-sided carrier on Southwest?

Generally, no. While Southwest states both soft-sided and hard-sided carriers are acceptable, hard-sided carriers rarely meet the flexible height requirement to fit under the seat. Soft-sided carriers are highly recommended due to their ability to compress.

What happens if my carrier is too big?

If your carrier exceeds Southwest’s maximum dimensions or cannot fit under the seat, your pet may be denied transportation. Southwest Airlines personnel strictly enforce these rules for safety and space considerations.

How many pets can I bring in one carrier?

You may bring one pet carrier per ticketed Customer. Each carrier can contain no more than two small, vaccinated cats or two small, vaccinated dogs of the same species, provided they can comfortably stand, turn around, and lie down inside.

Does Southwest have a pet weight limit?

Southwest Airlines does not explicitly state a weight limit for pets traveling in the cabin. The primary requirement is that your pet, along with its carrier, must fit comfortably under the seat in front of you, and your pet must be able to move freely within the carrier.

Can my pet come out of the carrier during the flight?

No, for the safety and comfort of all passengers, your pet must remain secured inside their carrier with the carrier stowed under the seat for the entire duration of the flight, including while in the gate area and during boarding and deplaning.