How to Choose an Airline-Approved Pet Carrier for Alaska, Delta & United Airlines

Planning to fly with your dog or cat? The first thing every pet traveler needs to know is this: not all pet carriers are created equal when it comes to airline approval. Each airline has its own size limits, material requirements, and ventilation rules — and getting it wrong at the gate can mean your pet doesn't fly.

Here's what you need to know before you book.

Why Airline Approval Matters

Airlines require that your pet's carrier fit under the seat in front of you. If the carrier is even slightly too large, too rigid, or doesn't have proper ventilation, it can be denied at check-in. The good news: soft-sided, expandable carriers are accepted on most major U.S. airlines.

Size Requirements by Airline

Alaska Airlines
Maximum dimensions: 17" x 11" x 9.5" (L x W x H). The carrier must fit under the seat and be well-ventilated on at least two sides.

Delta Airlines
Maximum dimensions: 18" x 11" x 11". Soft-sided carriers that can compress slightly are generally accepted.

United Airlines
Maximum dimensions: 18" x 11" x 11". Carriers must have proper ventilation and a secure, lockable zipper.

What to Look for in a Compliant Carrier

• Expandable top panel — lets your pet stretch during the flight without exceeding size limits on the ground
• Locking safety zippers — required by most airlines for security
• Anti-scratch mesh panels — for ventilation and visibility
• Soft-sided construction — compresses slightly to fit snugly under the seat

Our Recommended Carriers

The Petskd Top-Expandable Pet Carrier (17×11×9.5", Grey) meets Alaska Airlines approved dimensions. It features a top-expandable panel, locking safety zippers, and anti-scratch mesh — ideal for small cats and dogs.

The Petskd Top-Expandable Pet Carrier (18×11×11", Black) meets Delta and United Airlines approved dimensions. Same trusted features in a slightly larger size for bigger small-breed pets.

Quick Tips Before You Fly

• Always check your specific airline's current pet policy before travel — policies can update
• Book your pet's cabin spot early; airlines limit the number of in-cabin pets per flight
• Let your pet get comfortable in the carrier at home at least a week before the trip
• Include a small familiar-scented item inside the carrier to reduce stress