SVAN: Flying With a Trained Service Animal in the Cabin

If you fly with a service animal, the booking code that matters to you is SVAN — the Special Service Request (SSR) code airlines use to indicate that a passenger is traveling with a trained service animal in the cabin. Getting the code on your reservation is the easy part; knowing the paperwork, timing, and day-of-travel rules is what makes the trip go smoothly.

This guide explains what SVAN means, who qualifies, and the steps to take from booking to touchdown.

What SVAN Means

Airlines use short SSR codes in their reservation systems to flag special handling. The three animal-related codes are:

The distinction matters: a service animal with a SVAN code travels in the cabin free of charge and outside the airline's pet limits, but it comes with documentation and behavior requirements that pets don't have.

Who Qualifies as a Service Animal

Under the U.S. Department of Transportation's Air Carrier Access Act rules, a service animal is a dog, regardless of breed or size, that is individually trained to do work or perform tasks for the benefit of a person with a disability — physical, sensory, psychiatric, intellectual, or other mental disability. Examples include guide dogs, hearing dogs, seizure-alert dogs, and psychiatric service dogs trained to perform specific tasks.

Two important boundaries:

• Emotional support animals no longer qualify. Since the DOT rule change that took effect in early 2021, U.S. airlines are not required to recognize ESAs as service animals, and virtually all of them now treat ESAs as ordinary pets (PETC rules and fees apply).
• Psychiatric service dogs do qualify and are treated the same as any other service dog — the animal must be trained to perform a task, not simply provide comfort by its presence.

Step by Step: Flying With a Service Animal

1. Book your flight and add SVAN to the reservation

When you book (or immediately after), contact the airline or use its accessibility/service-animal page to have the SVAN code added to your reservation. Most airlines cap the number of service animals per passenger at two.

2. Complete the DOT Service Animal Air Transportation Form

U.S. airlines may require the DOT's standardized Service Animal Air Transportation Form, in which you attest to the animal's health, training, and behavior. Airlines can require it up to 48 hours before departure if your booking allows; if you book closer to departure, you can generally present it at the gate or check-in. Many airlines now accept the form through an online accessibility portal — check your carrier's process on our airline pages.

3. Add the relief attestation for long flights

For flight segments of 8 hours or more, airlines may also require the DOT Relief Attestation Form, confirming the animal either won't need to relieve itself or can do so in a sanitary way.

4. Prepare your animal's paperwork and gear

• Current rabies vaccination and health records (bring copies)
• Harness, leash, or tether — required in the airport and on board
• Any destination-specific documents: international flights and Hawaii have their own animal import rules, quarantine requirements, and timelines that can take weeks or months, so start early

5. Plan the airport experience

• Arrive early — airlines may ask you to check in at the counter rather than online
• Locate the airport's service animal relief areas before you travel; U.S. airports are required to provide them, and our airport relief area directory lists locations and whether they're inside or outside security
• Limit food and water in the hours before boarding, and give your dog a relief break as close to boarding as practical

6. Know the rules on board

• Your service animal must fit on the floor within your foot space (larger dogs can partially extend under the seat in front) — it may not occupy a seat or block the aisle
• Bulkhead rows offer more floor space but no under-seat area; choose what suits your dog
• The animal must remain harnessed or leashed and under your control; airlines may deny boarding to an animal that growls, lunges, or relieves itself inappropriately

7. On arrival

Head for the nearest relief area — arrivals-level locations are listed in our relief area directory. For international arrivals, have your animal's documents ready for inspection.

Common Problems and How to Avoid Them

• Forms submitted late. If your airline requires the DOT form 48 hours out, submitting it the night before can mean gate-side delays. Do it when you book.
• Connecting itineraries that cross the 8-hour line. A single long segment triggers the relief attestation — check segment lengths, not total trip time.
• International surprises. Some countries require microchips, rabies titer tests, or advance import permits with long lead times. The airline's SVAN acceptance does not waive the destination country's rules.
• Untrained animals. Airlines can refuse animals that aren't under control. If your dog is still in training, most carriers treat it as a pet until training is complete.

More Resources

• Service animal articles and guides
• Airport pet and service animal relief areas
• Airline pet and animal policies
• What does AVIH mean?