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Flying with a dog starts with the right carrier. Small dogs usually travel in the cabin in a soft-sided bag that fits under the seat in front of you, while larger dogs, where an airline allows it, fly in a hard-sided kennel in the cargo hold. The phrase airline approved dog carriers is used loosely by sellers, though: there is no single universal standard, and each airline sets its own size and construction rules. Below we compare five well-known carriers on Amazon and show you how to check that the one you choose will be accepted on your flight.
Important: airline pet policies change and vary by airline, aircraft and route. Always confirm the current carrier size limits and pet rules directly with your airline before you book.
Our Quick Picks
- Best Overall In-CabinSherpa Original Deluxe Travel Pet CarrierCheck Price on Amazon
- Best Low-ProfileMr. Peanut's Gold Series Airline CarrierCheck Price on Amazon
- Best ExpandableSleepypod AirCheck Price on Amazon
Short on time? These are our top choices. Full reviews and comparisons are below.
Airline Approved Dog Carriers Compared
| Carrier | Type | Where It Flies | Best For |
|---|---|---|---|
| Sherpa Original Deluxe | Soft-sided bag | In cabin, under the seat | Best overall in-cabin carrier |
| Mr. Peanut’s Gold Series | Soft-sided tote, low profile | In cabin, under the seat | Tight under-seat spaces |
| Sleepypod Air | Soft-sided, expandable | In cabin, under the seat | Extra room at the gate |
| Petmate Sky Kennel 21 in | Hard-sided kennel | Cargo, where allowed | Small dogs up to about 15 lb |
| Petmate Sky Kennel 28 in | Hard-sided kennel | Cargo, where allowed | Dogs about 15-30 lb |
1. Sherpa Original Deluxe Travel Pet Carrier — Best Overall In-Cabin
The Sherpa Original Deluxe has been a go-to in-cabin carrier for years. Its spring-wire frame lets the sides flex slightly to squeeze under a seat, mesh panels give your dog airflow and a view, and it has a padded shoulder strap, a luggage-handle pass-through and a machine-washable faux-lambskin liner. Sherpa has also run a guaranteed-on-board program with participating airlines; check the listing and the airline for current details.
- Flexible frame fits under most seats
- Mesh ventilation on several sides
- Washable liner
- Comes in several sizes
Worth knowing: Choose the size by your airline’s under-seat limit first and your dog’s size second.
2. Mr. Peanut’s Gold Series Airline Carrier — Best Low-Profile
Some airlines and aircraft have especially tight under-seat space. Mr. Peanut’s low-profile Gold Series tote is designed for that, with a rigid wooden base insert that keeps the bottom flat, self-locking zippers to stop escape attempts, plush fleece bedding and a leash tether inside. It suits very small dogs that are comfortable lying down during the flight.
- Low profile for tight under-seat spaces
- Self-locking zippers
- Firm base insert
- Plush fleece bedding
Worth knowing: The low height is only suitable for small dogs that can lie down comfortably.
3. Sleepypod Air — Best Expandable
The Sleepypod Air compresses at the ends to fit under a seat, then expands to give your dog more room while you wait at the gate. It is a premium, well-built carrier that the brand has crash-tested for car use, which makes it a good all-rounder if you also drive with your small dog. It also appears in our cat carrier guide, since it works just as well for cats.
- Ends compress to fit under seats
- Expands for extra room when parked
- Premium, sturdy construction
- Doubles as a car carrier
Worth knowing: It is more expensive than basic bags; check its dimensions against your airline before buying.
4. Petmate Sky Kennel 21-Inch — Best Small Cargo Kennel
For airlines that accept pets in the hold, a hard-sided kennel is required, and the Petmate Sky Kennel is one of the best-known options. Petmate describes it as IATA compliant, with a heavy-duty plastic shell, a steel wire door, ventilation on all sides and ready-to-fly extras such as live-animal stickers and food and water cups. The 21-inch size suits dogs up to about 15 pounds.
- Heavy-duty shell with steel door
- Ventilation on all four sides
- Includes travel labels and cups
- Made in the USA
Worth knowing: Many major US airlines no longer accept pets as checked baggage or cargo except in limited cases, so confirm before you buy.
5. Petmate Sky Kennel 28-Inch — Best Medium Cargo Kennel
The 28-inch Sky Kennel suits dogs of roughly 15 to 30 pounds and has the same airline-focused design as the smaller model. It is also a sturdy kennel for car trips and a secure crate at home, so it is not a one-trip purchase. We also recommend it in our main dog crate guide for air travel.
- Sized for small-to-medium dogs
- Secure metal door and hardware
- Useful for car travel and home too
- Designed with airline rules in mind
Worth knowing: Your dog must be able to stand, turn around and lie down naturally; size up if in doubt.
How We Chose These Carriers
We selected long-running carriers from established brands with many owner reviews, and we compared under-seat fit, ventilation, security (zippers, doors and hardware), comfort and how widely each design is used for air travel. We do not list prices because they change often, and we do not claim a carrier will be accepted on every flight, because only your airline can confirm that.
In-Cabin vs Cargo: Which Does Your Dog Need?
| In Cabin | Cargo / Checked | |
|---|---|---|
| Typical dog size | Small dogs that fit in a carrier under the seat | Larger dogs, where accepted |
| Carrier type | Soft-sided, ventilated bag | Hard-sided kennel with a metal door |
| Where the dog stays | Under the seat in front of you | Pressurized, temperature-controlled hold |
| Availability | Offered by many airlines, limited spots per flight | Restricted by many US airlines; varies widely |
| Key check | Under-seat dimensions | Kennel construction and size rules |
How to Check Airline Carrier Size Rules
- Find your airline’s pet travel page and note the maximum carrier dimensions for your aircraft; they can differ by plane.
- Measure your dog standing, from nose to base of tail and from floor to top of head. Your dog must be able to stand, turn around and lie down.
- Compare the carrier’s listed dimensions with the airline limit. Soft carriers can often flex a little in height, hard kennels cannot.
- Book your dog’s spot when you book your ticket; airlines limit the number of pets per flight.
- Ask about health certificate and vaccination requirements, especially for international trips, and talk to your vet well before travel.
How to Prepare Your Dog to Fly
- Start carrier training weeks ahead. Leave the carrier open at home with treats and a favorite blanket so your dog sees it as a safe den.
- Practice short trips. Carry your dog around the house, then take car rides in the carrier.
- Exercise before the flight and offer a potty break as close to boarding as possible.
- Line the carrier with an absorbent pad and pack spare pads, bags and a leash.
- Ask your vet about any concerns, including whether your dog is healthy enough to fly. Many snub-nosed breeds face extra restrictions for health reasons.
If you are road-tripping instead, see our guides to crash-tested dog car harnesses and dog car seat covers.
Care and Cleaning
Wash soft carrier liners after every trip and spot-clean the bag with mild soap. Check zippers and mesh for tears before each flight. For hard kennels, wash the shell with warm soapy water, check that every bolt or clip is tight and that the door latches securely.
Our Verdict
For flying in the cabin, the Sherpa Original Deluxe is the best all-round airline carrier. Pick Mr. Peanut’s for tight under-seat spaces and the Sleepypod Air if you want extra room and a carrier that doubles for car travel. If your airline accepts dogs in cargo, the Petmate Sky Kennel in 21- or 28-inch is the classic choice. Whatever you pick, confirm the current rules with your airline first.
Related Guides
- 5 Best Cat Carriers in 2026 for Vet Trips, Car Rides and Flights
- 5 Best Dog Crates in 2026: Wire, Plastic, Soft-Sided, and Modular Picks Compared
- Best Crash-Tested Dog Car Harnesses in 2026: 3 Safer Ways to Travel
- 5 Best Dog Car Seat Covers and Hammocks in 2026 (Waterproof, Scratch-Resistant)
- 4 Best Cat Carriers for Two Cats (Double and Divided Carriers)
Frequently Asked Questions
What size carrier is allowed on a plane?
It depends on the airline and aircraft. Many in-cabin limits are around 17 to 19 inches long and 10 to 11 inches high, but always check your airline’s current limit before buying.
Are airline approved carriers guaranteed to be accepted?
No. Airline approved is a marketing term, and each airline sets its own rules. Check the carrier’s dimensions against your airline’s policy and ask the airline if you are unsure.
Can my dog fly in the cabin with me?
Many airlines allow small dogs in the cabin if the dog and carrier fit under the seat in front of you. Spots are limited, so book early and pay any pet fee required.
Soft or hard carrier for flying?
Soft-sided carriers are used in the cabin because they fit under seats. Hard-sided kennels are required for dogs flying in the cargo hold.
How do I get my dog used to a travel carrier?
Leave it open at home with treats and bedding, feed meals near it, then practice short periods with the door closed and short car rides. Start several weeks before your trip.