Short answer
Since a 2021 U.S. Department of Transportation rule, U.S. airlines may treat emotional support animals as pets, so pet fees and carrier rules apply on U.S. flights. Some airlines outside the U.S. may still accept ESAs on some routes; policies change often, so check with the airline before you buy. A travel letter is non-refundable once signed, including if an airline doesn't accept it. If your dog is trained to perform tasks for a psychiatric disability, U.S. airlines accept psychiatric service dogs with the DOT service animal forms.
U.S. airlines
Since a 2021 U.S. Department of Transportation rule (effective January 11, 2021), U.S. airlines may treat emotional support animals as pets, so pet fees and carrier rules apply on U.S. flights.
Airlines outside the U.S.
Some airlines outside the U.S. may still accept ESAs on some routes; policies change often, so check with the airline before you buy.
Before you buy a travel letter
A travel letter is non-refundable once signed, including if an airline doesn't accept it. Check your airline's current policy first. What airlines ask for.
Psychiatric service dogs
If your dog is trained to perform tasks for a psychiatric disability, U.S. airlines accept psychiatric service dogs with the DOT service animal forms.
General information, not legal advice. Last reviewed: November 13, 2026.
