10 Best Southwest Approved Pet Carrier 2026 in the United States

The Petskd Top-Expandable Pet Carrier is a solid option for travelers looking to bring their small pets on Southwest or Allegiant Airlines. Its dimensions (18x13x9.5 inches) are designed to fit comfortably under the seat, making it a great choice for pets weighing up to 12 pounds. One of its key strengths is the excellent ventilation; the mesh sides allow for airflow and visibility, so pets can enjoy the journey without feeling trapped. The structural design also stands out, with reinforced materials that prevent sagging and ensure stability, which is important for your pet's safety. Additionally, the locking zippers and adjustable rope buckle provide extra security to keep your pet safe during travel. The carrier is made from durable, waterproof polyester, which is vital for easy cleaning and longevity. Plus, it comes with a decent warranty, offering reassurance in case of any quality issues.

On the downside, the carrier is only suitable for small pets, which limits its appeal to pet owners with larger animals. It’s essential to check your pet's dimensions before purchasing, as not all small pets will fit comfortably. While the material is scratch-resistant, some users may find that the mesh can be vulnerable to sharp claws over time, despite it being upgraded to resist tearing. Also, the carrier being machine washable is a plus, but frequent washing could wear down the materials more quickly.

This carrier suits pet owners who travel frequently with small cats, dogs, or even rabbits, offering a comfortable and secure traveling experience. However, potential buyers should ensure their pets fit the specified size limits to avoid issues during travel.

The Petskd Top and Side Expandable Pet Carrier is designed specifically for small pets (dogs under 10 lbs and cats under 12 lbs) and meets Southwest Airlines’ under-seat size requirements. Its folded dimensions (18x13x9.5 inches) make it a good fit for traveling on Southwest and some other airlines, which is great if you need a reliable, approved carrier. It offers excellent ventilation with mesh panels on five sides, helping your pet stay cool and allowing you to keep an eye on them during travel. The carrier is made of durable, waterproof polyester with reinforced mesh to resist scratching and prevent escape, which adds peace of mind and longevity to the product.

Comfort-wise, it features an expandable top and side sections that increase space by about 80%, letting your pet sit, stand, or stretch when not restricted by airline rules. Security is well addressed with locking zippers, a collar buckle, and a sturdy frame that prevents sagging or collapsing. The carrier also includes practical extras like a shoulder strap and washable mats, making it easy to carry and clean.

This carrier is suitable only for very small pets, which limits its use if you have a larger animal. Also, you need to fold down the expandable parts during flights to meet size restrictions, which reduces space for your pet at that time. Pet owners flying Southwest with small dogs or cats will find this carrier a safe, breathable, and airline-compliant travel option.

The Sherpa Original Deluxe Travel Pet Carrier in Charcoal Gray is a versatile and travel-friendly option for pet owners. Sized at 19 inches long, 11.5 inches wide, and 11.75 inches high, it fits pets up to 22 pounds, making it suitable for small dogs and cats. The patented spring wire frame allows the rear end to be pushed down to fit comfortably under seats, meeting the requirements for domestic rail and air travel, including Southwest Airlines. Ventilation is well-considered, with mesh panels ensuring plenty of air flow, and escape-proof locking zippers for added security.

The carrier’s comfort features include a removable and machine washable cozy base liner and multiple entry points for easy loading of your pet. It's made from durable polyester, providing a robust yet soft-sided crate that can double for vet visits and daily outings. The padded handle and detachable shoulder strap offer flexible carrying options, while the large storage pocket and luggage strap that also serves as a seatbelt pass-through add to its practical design.

However, some owners may find the carrier slightly bulky for very tight spaces, and the weight limit requires careful consideration to ensure your pet isn't cramped. If ease of use and comfort for both pet and owner are top priorities, this carrier is a solid choice.