Travel · Air Carrier Access Act
Service dogs fly free. ESAs are mostly pets now.
The 2021 DOT rule rewrote air-travel rules for assistance animals. Service dogs still fly free in the cabin, no questions asked beyond a one-page form. Emotional support animals lost their special status — on most U.S. airlines, they now travel as pets, with pet fees and carrier rules.
We’ve been the trusted authority on service-animal travel since 1995, well before the 2021 rule change. Three decades of working with handlers, airlines, and the DOT means we know exactly which carriers misapply the rule and how to push back — and where the rule genuinely limits what you can do now.
What the 2021 DOT rule changed
Before December 2020, the Air Carrier Access Act (ACAA) treated emotional support animals like service animals for air travel — cabin access, no fees, no carrier required. Airlines pushed for a change after years of widely-publicized incidents involving inadequately-trained ESAs.
The DOT’s 2021 final rule narrowed the definition of “service animal” under the ACAA to dogs trained to perform tasks that mitigate a disability. ESAs are no longer in scope.
“Service animal means a dog that is individually trained to do work or perform tasks for the benefit of a qualified individual with a disability.”
— 14 CFR § 382.3 (revised 2021)
In plain English:for air travel, a service dog is a task-trained dog. ESAs, comfort animals, and any non-dog species (yes, even very-well-behaved cats) are considered pets and follow the airline’s pet policy.
Flying with a service dog
The current process is simpler than it gets credit for — and it’s the same on every U.S. airline:
- 1. Submit the DOT Service Animal Air Transportation Form. One page. You attest under penalty of perjury that the dog is task-trained and behaves appropriately. Most airlines require it 48 hours before the flight; some accept it at the gate. The form is identical across U.S. carriers (the DOT publishes the official version).
- 2. For flights longer than 8 hours,some airlines also require a separate “relief attestation” form (the dog can either hold it or relieve in a sanitary way during the flight). Same one- page format.
- 3. At the gate / on the plane, the dog stays at your feet or in your lap (under 65 lbs). No carrier required, no kennel, no cargo. The airline cannot charge a fee.
The DOT form is available on every major airline’s accessibility page. We also include a pre-filled version in every NSAR welcome packet for handlers who registered a service dog with us.
Flying with an ESA
On most U.S. airlines, an ESA flies as a pet. That means:
- A pet fee (usually $95–$150 each way per leg)
- The animal in an airline-approved carrier under the seat in front of you
- Weight limit (usually 16–20 lbs combined with the carrier)
- Limited number of pets per cabin per flight
- Reservation needed in advance — pet slots fill up, especially on holidays
A few airlines kept ESA-friendly policies after the rule change. Worth checking on a per-airline basis before you book. Latin American carriers and a few smaller U.S. ones still treat ESAs differently from pets, with reduced or waived fees. Confirm the policy at booking; the published policies change.
Note: airlines can’t refuse a dog that meets the service-animal definition just because the handler also holds an ESA letter. The dog’s status is what matters, not the paper. A dog can be both an ESA and a service dog if it meets the task-trained criteria.
International travel
The ACAA only covers flights to/from/within the U.S. on U.S. carriers (and foreign carriers’ flights to/from the U.S.). For international flights on foreign carriers, you’re subject to that country’s rules:
- EU. Regulation (EC) 1107/2006 covers disabled passengers; assistance-dog policies vary by airline. Some EU carriers still recognize ESAs.
- UK.The Equality Act 2010 covers assistance dogs — recognized programs include Assistance Dogs UK.
- Canada. Air Canada follows similar rules to the U.S. DOT for service dogs; ESAs treated as pets.
- Mexico, Latin America. Carrier-specific. Generally still ESA-friendly compared to U.S. carriers.
If you’re traveling with a service dog internationally, budget time for destination country veterinary requirements (rabies titer, microchip, health certificates) — the animal-import bureaucracy is independent from airline accessibility rules.
Trains, ride-share, hotels, cruises
- Amtrak + commuter rail.Service dogs ride free, no documentation required. ESAs follow Amtrak’s pet policy ($26 fee, under 20 lbs in a carrier).
- Uber, Lyft, taxis.Service dogs are covered under ADA Title III. A driver who refuses you can lose their account. ESAs are not covered — many drivers will still accept them, but it’s up to the driver.
- Hotels.Service dogs are ADA-covered. ESAs aren’t federally protected for nightly stays — check pet policies. Note: a long-term stay that becomes your residence (extended-stay hotels exceeding 30 days) may get FHA coverage.
- Cruises.Cruise lines aren’t covered by the ADA the same way land businesses are; their service- animal policies are private. Most do allow trained service dogs with advance arrangement. ESAs are typically not allowed.