Do you need a PSD letter to fly?

Short answer: no. For a flight on a U.S. airline, a psychiatric service dog does not need a PSD letter, a registry ID, or a paid certificate.

What the airline can actually ask for

The airline can ask for a current, completed U.S. DOT Service Animal Air Transportation Form. "Current" means you filled it out on or after the date you bought the ticket. If a flight is scheduled for 8 hours or more, it can also ask for the DOT relief attestation, which confirms how your dog will handle relief on a long flight.

At the airport, staff can ask two questions: whether the dog is needed because of a disability, and what work or task it's trained to perform. They can't ask about your disability, and they can't ask the dog to demonstrate its task.

Why the letter doesn't help

Both DOT forms are free to download. A letter from a website doesn't replace them, and an ESA letter doesn't turn an animal into a service dog. If your dog isn't task-trained, it can fly as a pet, and that's a perfectly good trip too. A service dog, a PSD, and an ESA are not the same thing at the airport.

We don't sell one

If you searched "buy a PSD letter" and landed here: we don't sell one, because you don't need one. Plan my trip and the Travel Pass has the form your airline uses, after you pay.

Also read: Service dog vs ESA vs PSD and the DOT service animal form, explained.

Source: 14 CFR Part 382, Subpart E (the two questions in § 382.73; forms, and the bar on extra documentation, in § 382.75). Checked October 18, 2026.