How big can a dog carrier be for an airline?

There are no laws dictating the type of carrier to use, but remember that it must be small enough to fit under a standard airplane seat and should generally not exceed 45 linear inches (length + width + height), or roughly 21.5 by 15.5 by 9 inches. Depending on the airline, carrier size limits may be even smaller.



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At the time of publishing, to travel with a pet on Delta, United, or American Airlines, your soft-sided pet carrier must be 18 by 11 by 11 inches or smaller. To travel with a pet on JetBlue, your in-flight carrier can't exceed 17 by 12.5 by 8.5 inches, and cargo hold dimensions vary.

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As a general guide: To measure your dog for a travel crate, measure the length of your pet when standing from the base of his tail to the tip of his nose and add 4” to this measurement. That is how long your crate should be.

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Carrier requirements may change from airline to airline, but dogs should be able to stand naturally and turn around inside it without touching the sides or top. Can my cat or dog sit on my lap? No. Pets are required to stay in their carrier throughout your domestic flight, stored under the seat in front of you.

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On-board. On the plane, your small pet must remain in the carrier at all times. You cannot remove the animal from the carrier while on the plane. The carrier containing your dog can only go completely under the seat in front of you.

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So long as your dog is crated, many airlines, such as Alaskan or American Airlines, allow large dogs to be checked baggage. As the pet owner, you will bring your dog to check in as you would normally with your other bags, and then they will be weighed and moved like the rest of your bags.

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Your pet container must be small enough to fit underneath the seat without blocking any person's path to the main aisle of the airplane. Your pet container must be stowed properly before the last passenger entry door to the airplane is closed in order for the airplane to leave the gate.

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A 40-pound dog is indeed too large to travel in-cabin on most (if not all) airlines and will have to ride as cargo. Besides very small pets, only trained and certified service or support dogs with legitimate documentation can sometimes accompany their owners in-cabin.

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By Plane: Fly with your dog. Several airlines do accept large dogs by storing them in the plane's cargo. The hold is temperature-controlled and pressurized, so it is a humane way to transport them. For most airlines, pets weighing 17 pounds or more qualify as large and must travel in the hold.

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As a rule, animals 100 lbs. or larger (including the weight of the cage) will be charged as cargo even if they travel on the same plane as you. Check with the airline if your pet is close to that weight and to determine if the airline policy may vary from this general 100 lb. rule.

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Many airlines allow pets to fly in the cabin as a carry-on, so long as they stay inside a carrier that's small enough to fit under the seat in front of you for the duration of the flight. Southwest, Alaska, United, American, Delta, Hawaiian, Spirit, and Frontier are some of the airlines that allow pets as carry-ons.

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Your pet can travel on the plane with you (either in-cabin, as accompanied baggage, or as cargo). Your pet will be charged accordingly. Some airlines no longer offer this option and some countries do not allow pets to enter the country in-cabin.

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A pheromone calming collar to help lower anxiety. Trazodone (brand name Desyrel®), gabapentin (brand name Neurontin®), and alprazolam (brand names; Xanax®, Niravam®) are examples of medications that are sometimes prescribed by veterinarians to reduce the anxiety that some dogs experience when traveling.

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Your pet dog or cat is secured inside their IATA-compliant crate before boarding the flight. Most airlines ensure your pet boards and disembarks the aircraft on priority.

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For travelers bringing their pets in the cabin, she said, book a window seat, as the pets will be farther from commotion in the aisle. Those seats also may have more space underneath.

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You need to know your dog's height and length to select the correct carrier size. The carrier should be large enough for him to turn around easily and to curl up or stretch out when lying down. Measure his back from his neck, where the collar sits, to the base of his tail. Then add a few inches to that measurement.

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Make sure your pet fits While there are no weight or breed limitations for pets, they must travel in either a hard-sided or soft-sided carrier. This carrier must fit under the seat in front of you or you cannot fly with your pet.

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For dogs heavier than 25 pounds, the owner must purchase an additional seat. There is a maximum of two pets per passenger. For a single passenger with more than one pet, an additional seat must be purchased for the second pet, regardless of the pet's weight.

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Exception: Working dogs on a leash. Working and service animals are allowed inside the passenger terminals as long as they are on a leash. All other animals must be in a kennel. Not all those traveling with pets adhere to these rules, and many can be seen walking their dogs on leashes throughout the airport.

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One of the top reasons for concern is the cleanliness of aeroplanes. They aren't the cleanest of places and can, therefore, carry many germs and illnesses, such as Parvo, that can be picked up by pets and can sometimes be deadly and easily transmitted to others.

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THE WEEKS AND DAYS BEFORE YOUR TRIP At least a month before your flight, introduce your dog to his pet travel carrier. Place it in the busiest area of your home with the door open. Encourage your dog to explore, play, relax, and rest in the carrier during the day.

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