Best Pet Carriers for Cats and Small Dogs

Sherpa Original Deluxe Small at $34.60 earns the top spot with the credential that matters most for air travel: broad airline approval backed by a patented spring wire frame that lets the bag expand under the seat during flight. That expandable design gives your pet measurably more room than a rigid carrier allows on long flights — a real comfort difference for animals that get anxious in confined spaces. At $34.60, it's $4 less than the Sherpa Medium ($38.99) and $29 less than the Petsfit Expandable ($63.99). The honest sizing limit is the 18-inch small form factor: it fits pets comfortably up to about 8 lbs. Cats above that weight or larger small breeds need the medium version. Airlines also vary in pet-in-cabin policies — always confirm with your specific carrier before booking. Choose the Sherpa Small if your pet is under 8 lbs and airline travel is the primary use case. The Sherpa Medium at $38.99 handles pets up to 16 lbs with the identical expandable design. The Petsfit at $63.99 is the step up if maximum in-cabin expansion space is the priority.

Sherpa Original Deluxe Medium at $38.99 is the rank 2 pick for a straightforward reason: it fits a wider range of pets than the $34.60 small at rank 1. Cats up to 16 lbs and larger small dogs fit where the small tops out at 8 lbs. The patented spring wire expandable frame, airline-approved dimensions, and ventilation mesh on all sides carry over unchanged from the small version. The $4.39 premium over the small is purely about size, not features — same Sherpa construction, same expandable design. The honest note is that the medium, while larger, still runs tight around cats over 10 lbs. It's not a carrier for large or particularly anxious animals. The fabric exterior picks up lint and pet hair noticeably compared to hard-sided carriers. Choose Sherpa Medium if your pet is between 8 and 16 lbs, or if the small would be uncomfortably tight. The Sherpa Small at $34.60 is the better pick for pets under 8 lbs and saves $4. The Petsfit Expandable at $63.99 offers maximum in-cabin space if the animal needs more room than either Sherpa size provides.

Petsfit Expandable Soft-Sided Pet Carrier adds an expansion panel that increases interior space during flight — the key feature for pets who pace or turn in extended trips. The carrier meets airline cabin-approved dimensions in the standard configuration, and the expansion panel provides additional headroom when under-seat space allows. Four mesh ventilation panels maintain airflow from multiple sides, and the included plush mat provides cushioning for the carrier floor. At $63.99, the Petsfit Expandable sits approximately $25 above the Sherpa Original Deluxe at $34.60 to $38.99. The Sherpa is the classic soft carrier with strong brand recognition in airline pet travel; the Petsfit premium buys the expandable panel for in-flight space that the Sherpa doesn't offer. For pets who need more room during long-haul flights, the expandable feature addresses a real comfort limitation that standard-dimension carriers impose. Choose the Petsfit Expandable Carrier for longer flights where your pet benefits from the option of additional space — the expansion panel provides genuine comfort improvement for pets who get anxious in confined spaces. Note that the included plush mat compresses with use and may need replacement over time. Skip it for shorter trips or frequent travelers who prioritize lighter, proven carry: the Sherpa Original Deluxe at $34 to $38 is lighter and has a longer track record in airline environments.