United Airlines Service Animal Rules: Who Qualifies, Forms, and How to Fly

As of September 2026, a United Airlines service animal is a task-trained dog that flies in the cabin free of pet fees—up to two per passenger—after U.S. Department of Transportation (DOT) forms are filed. Emotional support, therapy, and comfort animals are not service animals under federal air rules or United policy; they travel as pets in a carrier. Dogs in training are not accepted. Call United’s Accessibility Desk before international, Hawaii, or Guam trips.

This guide explains how United Airlines applies the Air Carrier Access Act (ACAA) service-animal rules in 14 CFR Part 382, what paperwork to file, how service dogs differ from pets and emotional support animals, and what changes for international itineraries. It also distinguishes airline disability accommodations from Animal Passport’s biometric livestock identity product, which is not a government travel document and does not replace DOT or airline forms.

What counts as a United Airlines service animal?

Under the United States Department of Transportation’s disability regulation for air travel, a service animal is “a dog, regardless of breed or type, that is individually trained to do work or perform tasks for the benefit of a qualified individual with a disability,” including physical, sensory, psychiatric, intellectual, or other mental disabilities, according to 14 CFR § 382.3 (Electronic Code of Federal Regulations). Species other than dogs, emotional support animals, comfort animals, companionship animals, and service animals in training are not service animals for Part 382.

United Airlines’ official Service Animals page aligns with that federal definition: the only service animals permitted on United and United Express flights are dogs trained to perform tasks for someone with a disability. United states that trained service dogs fly with their owners for free, that dogs that do not behave appropriately in public places are not treated as trained service dogs, and that dogs in training are not accepted. For domestic flights, United requires the dog to be over 4 months old; for international flights, United requires the dog to be 6 months old.

Psychiatric service dogs that perform disability-related tasks remain service animals under the DOT definition. Presence alone—comfort without a trained task—does not qualify. The U.S. Department of Justice (DOJ) makes a similar task-based distinction for the Americans with Disabilities Act (ADA) on land, while noting that airplane rights are governed by the Air Carrier Access Act, not the ADA, according to ADA.gov’s Service Animals topic page.

Federal rule that shaped today’s airline policies

DOT’s final rule “Traveling by Air With Service Animals,” published in the Federal Register on December 10, 2020 (85 FR 79742), took effect on January 11, 2021. The rule (1) limited the ACAA definition of service animal to dogs, (2) allowed airlines to treat emotional support animals as pets rather than service animals, (3) allowed a two-animal limit per passenger, and (4) authorized standardized DOT attestation forms for health, behavior, and training, plus a relief attestation for long flights.

Carriers must allow a service animal to accompany a passenger with a disability and may not deny transport based on breed or type, according to 14 CFR § 382.72. Carriers are not required to accept more than two service animals for a single passenger with a disability, according to 14 CFR § 382.74—the same two-dog ceiling United publishes for free cabin travel.

Forms United requires (and what federal law allows)

Airlines may require a current completed U.S. Department of Transportation Service Animal Air Transportation Form as a condition of cabin travel, according to 14 CFR § 382.75(a). For a flight segment scheduled to take 8 hours or more, airlines may also require the DOT Service Animal Relief Attestation Form, according to § 382.75(b). “Current” means the form was completed on or after the date the passenger purchased the airline ticket.

United’s Service Animals page directs passengers to complete the DOT training-and-behavior attestation for all service animals and the relief attestation for flights of 8 hours or more. MileagePlus members can complete and save the form in a profile, then add it to Trip Details after booking; passengers may also print the PDF and carry it. For international flights and flights to Hawaii and Guam, United says the Accessibility Desk must be contacted first, and forms cannot be completed electronically—they must be printed and carried.

The September 2024 DOT Service Animal Air Transportation Form (OMB Control Number 2105-0576) warns that knowingly making false statements to secure disability accommodations is a federal crime under 18 U.S.C. § 1001. Handlers attest that the dog is rabies-vaccinated, task-trained, behavior-trained for public settings, and will remain harnessed, leashed, or tethered. Submit the form to the airline, not to DOT, the form instructions state.

Advance notice timing

If the reservation was made more than 48 hours before the first scheduled departure, an airline may require the forms up to 48 hours in advance, according to 14 CFR § 382.75(g). If the ticket was bought within 48 hours of departure, the airline may not require advance submission and must allow gate-day hard-copy submission. If advance notice is missed, the carrier must still try to accommodate with reasonable efforts without delaying the flight, according to § 382.75(h).

How to book a service dog on United: step by step

1. Confirm eligibility. The animal must be a dog individually trained for disability-related tasks—not an emotional support or therapy animal, and not a dog still in training (United policy; DOT § 382.3).
2. Check age. United requires over 4 months for domestic flights and 6 months for international flights.
3. Book the flight, then declare the dog. For most domestic trips, United’s page instructs passengers to select that they are bringing a task-trained service dog and complete paperwork in Trip Details after booking.
4. Call for international, Hawaii, or Guam. Contact United’s Accessibility Desk at 1-800-228-2744 before relying on online forms; destination animal-entry rules can block boarding even when federal cabin rules are met.
5. Complete DOT forms. File the Service Animal Air Transportation Form for every trip that requires it; add the Relief Attestation if any segment is 8 hours or longer.
6. Plan cabin placement. Under 14 CFR § 382.77, the dog may sit in the passenger’s lap or foot space unless that conflicts with Federal Aviation Administration (FAA) safety rules or encroaches on another passenger’s space. Large dogs may need reseating within the same cabin class when space is available.
7. Keep control at the airport. Carriers may require harness, leash, or tether, according to 14 CFR § 382.73(b). United advises using its app to locate designated animal relief areas.

Service dog vs. emotional support animal vs. pet on United

United’s Service Animals page states plainly that therapy and emotional support dogs and cats fly as pets and must remain in a carrier in the airport and on the plane, and that any other type of animal needs to stay at home. Always verify current in-cabin pet eligibility, carrier dimensions, and fees on United’s Traveling with pets pages before booking a non–service-animal itinerary; pet commercial rules change more often than the federal service-animal definition.

When United can refuse a service dog

Under 14 CFR § 382.79, a carrier may deny transport if the animal poses a direct threat to health or safety; causes significant disruption or shows it has not been trained to behave in public; would violate applicable federal, territorial, or foreign health or safety requirements; or if required current DOT forms are not provided. Denials based on direct threat or misbehavior must be individualized and independent of breed or type. If transport is refused, the carrier must give a written reason at the airport or within 10 calendar days.

Carriers may not invent extra service-animal restrictions beyond Part 382 unless required by the FAA, the Transportation Security Administration (TSA), other federal rules, or a foreign carrier’s government, according to 14 CFR § 382.80.

ADA vs. ACAA: why airport and airplane rules differ

On the ground, titles II and III of the ADA generally define service animals as dogs individually trained for disability-related work or tasks; emotional support animals that provide comfort alone do not qualify, according to DOJ’s ADA Requirements: Service Animals guidance (last updated February 28, 2020). ADA-covered businesses generally may not require documentation that a dog is certified.

Airplanes are different. ADA.gov states that the Air Carrier Access Act—not the ADA—protects people with disabilities in air travel, and directs complaints to DOT’s Aviation Consumer Protection Division. That is why United and other U.S. carriers may require DOT attestation forms that a restaurant or hotel generally could not demand under ADA rules.

International, Hawaii, and Guam: extra layers beyond United cabin policy

Even when United accepts a service dog under ACAA rules, destination animal-health rules can still block entry. United therefore requires passengers on international flights and flights to Hawaii and Guam to call the Accessibility Desk at 1-800-228-2744 first. Some international destinations, United notes, require training by a recognized accredited organization.

For dogs entering the United States, the Centers for Disease Control and Prevention (CDC) sets rabies-related importation requirements that depend on vaccination history and countries visited in the prior six months, according to CDC’s Bringing a Dog into the U.S. page (updated August 1, 2024). CDC also notes that U.S. Department of Agriculture (USDA) and destination-state rules may apply in addition. Plan CDC, USDA Animal and Plant Health Inspection Service (USDA APHIS), and foreign ministry requirements separately from United’s cabin accommodation process.

Animal Passport vs. airline and EU travel documents

Airline service-animal forms, USDA/APHIS movement certificates, EU pet passports under Regulation (EU) No 576/2013, and the former UK Pet Travel Scheme (PETS) are official or regulatory travel frameworks. They are not the same product as Animal Passport.

Animal Passport is a digital animal and livestock identity system that uses muzzle biometrics (a nose print treated as unique, analogous to a fingerprint). Capture is phone-based. A record can bind owner, breed, estimated age, body condition, and vaccination history. Age can be estimated from a dental photograph with a confidence score, and body condition can be scored 1–5 from a side-profile photo. In August 2025 flood rescue operations in Pakistan, the system helped farmers reclaim animals after paper tags washed away. Explore related travel explainers on the Animal Passport blog.

Animal Passport does not diagnose veterinary disease, does not give legal advice, and is not a government-issued United Airlines or DOT travel credential unless an official source expressly says otherwise—which current airline and DOT materials do not. Use Animal Passport for durable identity and health-history records where appropriate; use United’s Accessibility Desk and DOT forms for cabin service-dog accommodation.

Practical checklist the day of travel

• Printed or electronic DOT forms as United directed for your itinerary
• Harness or leash; dog under control in gate areas
• Rabies vaccination details matching what you attested on the DOT form
• For long-haul segments of 8+ hours, Relief Attestation completed
• For international/Hawaii/Guam, confirmation that Accessibility Desk guidance and destination import papers are complete
• Backup plan if the dog cannot fit without encroaching on another passenger’s space (reseating within class, later flight, or free cargo hold offer under § 382.77(c) when cabin options fail)

False statements on DOT forms can trigger federal criminal liability under 18 U.S.C. § 1001, as printed on the DOT Service Animal Air Transportation Form. Accurate task descriptions and honest behavior history protect both handlers and other passengers.

Last updated September 17, 2026. Byline: Animal Passport editorial. Policies and fees change; confirm details on United’s Service Animals page and with the Accessibility Desk before you fly. This article is informational, not legal or veterinary advice.