Flying With a Service Dog (2026): DOT Rules & Forms

You can't register a dog as a service dog in the US, because no official registry exists. The ADA and the Department of Transportation don't recognize online certificates or ID cards. To fly with a service dog, you fill in the DOT's own forms for your airline, and the dog flies in the cabin for free.

Key facts

Under US DOT rules in force since January 11, 2021, only a dog individually trained to do work or perform tasks for a person with a disability counts as a service animal on a plane.
Airlines can require the DOT Service Animal Air Transportation Form, plus a relief form for flights of 8 hours or more.
If you booked more than 48 hours before departure, the airline can ask for the forms up to 48 hours ahead.
Airlines can't charge a fee for a service animal. They can limit you to two service animals.
The dog has to fit at your feet or on your lap without taking up another passenger's space.

How to register my dog as a service dog

You can't, because no official registry exists to register with. The Department of Justice, which enforces the Americans with Disabilities Act (ADA), says that mandatory registration of service animals is not allowed. It also says it does not recognize the certificates or registration documents sold online as proof that a dog is a service animal.

Any "federal service dog registration" or "national service animal registry" is a private business. Paying one gives you no legal rights, and its paperwork doesn't replace the DOT forms.

What makes a dog a service dog is its training: under both the ADA and the Air Carrier Access Act, it must be individually trained to do work or perform tasks for a person with a disability. A vest or ID tag isn't required.

Flying with a service dog: the DOT rules

The Air Carrier Access Act rules (14 CFR Part 382) cover airlines flying to, from and within the US. The current version took effect on January 11, 2021. As of October 2026:

Dogs only. A service animal is a dog of any breed or type. Airlines can choose to accept other species, but they don't have to.
Trained, not just comforting. Emotional support, comfort and companionship animals are not service animals. They fly as pets. See emotional support animals on planes.
No breed bans. An airline can't refuse a service dog because of its breed. It has to judge the individual dog.
Two at most. An airline doesn't have to accept more than two service animals for one passenger.
On a leash. The airline can require the dog to be harnessed, leashed or tethered at all times at the airport and on the plane.
Online check-in is allowed. An airline can't make you check in at the counter just because you have a service dog.

What forms do airlines require for a service dog?

Airlines can ask for two DOT forms, and no other paperwork except what a government requires for the trip (for example, entry rules abroad).

Form	When it's needed	What you confirm
DOT Service Animal Air Transportation Form	Any flight, if the airline asks for it	The dog's health, its training, and that it will behave
DOT Service Animal Relief Attestation Form	Flights of 8 hours or more	The dog won't need to relieve itself, or can do so in a sanitary way

When do you have to send them?

Booked more than 48 hours before the flight: the airline can require the forms up to 48 hours before departure.
Booked within 48 hours: the airline can't require advance notice, but it can ask you to hand over the forms at the departure gate.

Airlines must let you send the forms electronically or on paper, and must keep copies at every airport they serve. Delta asks for the forms and a service request at least 48 hours ahead. American recommends sending the form to its Special Assistance Desk 48 hours ahead or bringing it to the airport. JetBlue takes requests through Open Doors Organization at least 48 hours before the flight. If you miss a deadline, the airline must still try to take you and your dog if it can do so without delaying the flight.

Each airline sets out where to send the forms: see Delta, American and JetBlue.

Do service dogs fly free?

Yes. US airlines can't charge you to fly with a service animal. They can only charge for damage the dog causes, and only if they would charge other passengers for the same kind of damage.

The free ride covers floor space at your own seat. If a large dog doesn't fit, the airline must offer another seat in the same cabin class if one is free. If that doesn't work, it must offer to carry the dog in the hold for free or put you on a later flight with room. Delta says two service dogs, or a large one, may need extra tickets so that you have enough floor space.

Service dogs in training don't count. American, for example, says they travel as pets, and pet fees apply.

Where do service dogs sit on a plane?

At your feet, in the space under the seat in front of you. A small service dog can sit on your lap if that's safe. American says a lap dog must be smaller than a 2-year-old child. The dog can't block the aisle or an emergency exit, and it can't spill into another passenger's foot space.

Airlines don't have to upgrade you to another class, and can't refuse a dog just because it makes others uncomfortable.

How should a service dog behave on a plane?

The DOT lets airlines refuse a dog that poses a direct threat to others, causes a significant disruption, or behaves badly without being provoked. The DOT's examples include barking, snarling, running around and jumping on people. Airline staff can ask whether the dog is needed because of a disability and what task it's trained to do. They can also watch how it behaves and see whether it's harnessed or leashed.

Psychiatric service dogs

Since 2021, psychiatric service dogs are treated the same as any other service dog. The DOT definition covers physical, sensory, psychiatric, intellectual and other mental disabilities. American lists post-traumatic stress disorder as an example.

The difference from an emotional support animal is training. The Department of Justice gives the example of a dog trained to sense an oncoming anxiety attack and act to help avoid it or lessen it. A dog whose presence alone is comforting doesn't qualify.

TSA service dog requirements

TSA doesn't ask for service dog paperwork at security. Its published screening steps are:

Tell the TSA officer that you have a service animal.
Walk through the metal detector together, or send the dog through first on its leash.
If the detector alarms, you and the dog get extra screening, which can include a pat-down. If you decline the metal detector, you both get a pat-down.

TSA says it won't separate you from your service animal. A harness or leash with little metal helps. If you leave security so your dog can relieve itself, you'll both be screened again, but you can ask to go to the front of the line.

Flying with a service dog outside the US

US airlines flying abroad must follow the destination country's rules. Not every country accepts service animals from other countries, so check entry rules early.

Coming back into the US: service dogs need a CDC Dog Import Form receipt like any other dog. CDC uses the DOT definition, so emotional support dogs don't qualify for the service dog exceptions.
Canada: carriers can ask for a declaration that your dog is individually trained, or a document from the trainer. Within Canada, a Canadian carrier must provide an adjacent seat at no extra cost if the dog doesn't fit in the floor space.
Europe: each airline sets its own documents and notice periods. KLM asks for notice 48 hours ahead and a training certificate, and British Airways takes assistance dogs trained by a recognized organization.

Questions people ask

Do service dogs have to be registered?

No. The ADA doesn't allow mandatory registration, and no official US service dog registry exists. Airlines may ask for the DOT Service Animal Air Transportation Form, but they can't require any other proof that a dog is a service dog.

Is there a federal service dog registration?

No. Sites that sell "federal" or "national" registration are private businesses. The Department of Justice says it doesn't recognize their documents as proof that a dog is a service animal.

What is the DOT service animal air transportation form?

It's a one-page US DOT form where you confirm your dog's health, training and behavior. Airlines can require it for any flight, and can ask for it up to 48 hours ahead if you booked earlier than that.

Can I fly with two service dogs?

Yes, airlines must accept up to two service animals per passenger. Both have to fit in your foot space or on your lap, and Delta says you may need to buy an extra seat to get enough floor space.

Can my emotional support dog fly as a service dog?

No. Since January 11, 2021, US airlines don't have to treat emotional support animals as service animals. Most airlines carry them as pets, which means a carrier and a pet fee.

Service dogs on planes: DOT rules, forms and the registry myth