United Airlines Flying With Pets: 2026 Rules, Fees & Requirements

United Airlines flying with pets is limited to cats and dogs traveling in the cabin inside an approved carrier stowed under the seat in front of you, for a fee widely reported at $150 each way as of September 2026. United does not offer general-public pet cargo shipping — that option was suspended in 2018 — and international trips require a USDA- or government-endorsed health certificate rather than an EU-style pet passport. This guide breaks down the rules by travel type, cites the U.S. Department of Transportation (DOT), USDA APHIS, and the CDC, and explains where a digital pet ID product like Animal Passport does and does not fit in.

United Airlines Pet Travel Policy at a Glance

As of September 2026, United Airlines offers three ways an animal can travel: as an in-cabin pet, as a DOT-recognized service dog, or, for a narrow group of travelers, as checked cargo. The table below summarizes the differences based on United's published policy as tracked by CabinPets, a dedicated airline pet-policy resource, and the DOT's service animal rule.

Emotional support animals are not covered by the DOT service animal rule and fly as ordinary in-cabin pets, subject to the standard fee and carrier limits (U.S. Department of Transportation, 2020).

In-Cabin Pet Rules: Carrier Size, Fees, and Limits

United's in-cabin pet program is the option available to most travelers with a cat or small dog. According to CabinPets' current tracking of United's policy (verified September 2026), the airline permits:

• Only cats and dogs — no other species in the cabin
• A soft-sided carrier up to 18 x 11 x 11 inches, or a hard-sided carrier up to roughly 17.5 x 12 x 9 inches
• Up to two pets per passenger on most aircraft, though only one pet per passenger is allowed on smaller jets such as the A319, A320, A321neo, 737-800/MAX 8, and 737-900/MAX 9
• An in-cabin fee reported at $150 each way
• A minimum pet age, with puppies and kittens generally required to be several weeks to a few months old before travel

The carrier must remain closed and stowed under the seat in front of you for the entire flight — pets are not permitted to be held or to occupy a seat. Because fees, aircraft-specific limits, and embargoed routes change, confirm exact figures on United's own booking page before you fly.

Can You Ship a Pet as Cargo on United Airlines?

No — not if you are a general member of the public. United suspended its PetSafe checked-cargo program in 2018 after a series of high-profile incidents, including a dog's death after being placed in an overhead bin and a pet mistakenly flown to the wrong country. As of 2026, that suspension has not been reversed for the general public.

Today, checked pet cargo on United is limited to a narrow Military Pet Program: active-duty U.S. military personnel with permanent change of station (PCS) orders and U.S. State Department Foreign Service personnel, along with their spouses in some cases. These travelers must typically book 5 to 10 days in advance through a dedicated military reservations channel, provide a health certificate issued within 10 days of travel, and meet a combined pet-and-carrier weight limit reported around 99.9 pounds, with certain breeds restricted from the cargo hold.

Flying With a Service Animal on United

Service animal rules on United flow from a federal regulation, not an airline preference. In December 2020, the U.S. Department of Transportation finalized a rule under the Air Carrier Access Act that narrowed the legal definition of a service animal to a dog individually trained to do work or perform a task for a person with a disability, aligning air travel rules with the Department of Justice's Americans with Disabilities Act standard. The rule took effect in January 2021 and remains the governing standard in 2026.

Under this DOT rule, airlines including United may require passengers to submit a DOT Service Animal Air Transportation Form attesting to the animal's health, training, and behavior, and, for flights of eight hours or longer, a Relief Attestation Form confirming the dog can either avoid relieving itself or do so sanitarily. Airlines can ask travelers to submit these forms up to 48 hours before departure, but must accept them at the gate if submitted later. Emotional support animals and species other than dogs no longer qualify as service animals under this rule and are instead booked and charged as regular in-cabin pets.

International Pet Travel: Health Certificates and Import Rules

International trips add a layer of government paperwork on top of United's own carrier and fee rules. According to United's policy as tracked by CabinPets, a health and vaccination certificate is required on every United international flight, including flights to Canada and Mexico, and Mexico entry can require an additional USDA-accredited veterinary inspection certificate.

The United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS) advises pet owners to contact a USDA-accredited veterinarian as soon as they decide to travel so the vet can help identify destination-specific paperwork and, where needed, obtain a USDA-endorsed health certificate (USDA APHIS, 2026). USDA APHIS also publishes a free Pets on Planes training resource, last updated November 13, 2025, covering how to prepare cats and dogs for safe air travel.

If you are flying a dog into the United States from abroad, separate Centers for Disease Control and Prevention (CDC) rules apply. Under CDC requirements that took effect August 1, 2024, all dogs entering the U.S. must be vaccinated against rabies, and additional certification is required for dogs that visited a country classified as high-risk for dog rabies within the previous six months. Unvaccinated dogs arriving from high-risk countries are not permitted entry (CDC, 2024).

The International Air Transport Association (IATA) also maintains the Live Animals Regulations (LAR), which IATA describes as the worldwide standard for transporting live animals by commercial airlines, covering species-specific containers and handling procedures that many carriers reference when building their own pet policies (IATA, 2026 edition).

United Airlines Pet Policy vs. an EU-Style Pet Passport

A common point of confusion is the term pet passport. In the European Union, a pet passport is an official document under the EU's pet travel scheme that records a companion animal's microchip number, rabies vaccination, and owner details for travel between EU member states. United Airlines does not issue or require this EU document for U.S. domestic or most international itineraries; instead, it requires the health certificates and government forms described above.

This is also distinct from Animal Passport, a digital identity product built around muzzle biometrics, since a nose print is unique to each animal much like a human fingerprint. Animal Passport uses a phone camera to capture that muzzle print and link it to a record covering the owner, breed, an estimated age from a dental photograph with a confidence score, and a body condition score from 1 to 5 derived from a side-profile photo. It was used during livestock flood rescue efforts in Pakistan in August 2025, helping farmers reclaim animals after paper ear tags were washed away. Animal Passport is a livestock and companion-animal identity tool, not a government-issued travel document, and it does not replace the USDA health certificate, CDC import paperwork, or DOT service animal forms an airline like United requires. Readers researching pet identification more broadly can see related coverage on the Animal Passport blog.

How to Book a Pet Flight on United: Step by Step

1. Confirm your pet is a cat or dog old enough to travel, since United's in-cabin program does not accept other species.
2. Measure your carrier against United's published limits (soft-sided up to 18 x 11 x 11 in; hard-sided up to about 17.5 x 12 x 9 in) before you book.
3. Add the pet to your reservation early, since United limits the number of pets allowed per flight and per passenger.
4. For international trips, contact a USDA-accredited veterinarian well before departure to arrange a health certificate and any destination-specific paperwork (USDA APHIS, 2026).
5. If flying a dog into the U.S. from abroad, check the CDC's dog import rules that took effect in 2024 and gather any required rabies certification.
6. If traveling with a trained service dog, complete the DOT Service Animal Air Transportation Form, and the Relief Attestation Form for flights of eight hours or more, and submit it to United, ideally at least 48 hours ahead.
7. Reconfirm fees, carrier rules, and any embargoed routes directly with United close to your travel date, since airline pet policies change periodically.

Frequently Asked Questions

Does United Airlines allow pets in the cabin?

Yes. United allows cats and dogs in the cabin inside an approved carrier that fits under the seat in front of you, for a fee reported at $150 each way as of 2026.

Can I ship my pet as cargo on United Airlines?

Generally no. United suspended its general-public PetSafe cargo program in 2018, and checked pet cargo is now limited to active-duty U.S. military and State Department personnel on relocation orders.

Does United Airlines require a pet passport?

No. United does not require the EU-style pet passport used within the European Union; instead, it requires a health and vaccination certificate for international flights, per United's published policy.

Are emotional support animals allowed on United flights?

Emotional support animals are not recognized as service animals under the DOT's 2020 rule and must fly as regular in-cabin pets, subject to United's standard pet fee and carrier requirements.

What documents does a service dog need to fly on United?

Under DOT rules, United may require a Service Animal Air Transportation Form, and for flights of eight hours or longer, a Relief Attestation Form, both developed by the U.S. Department of Transportation.

What are the CDC rules for bringing a dog into the U.S. on a flight?

Since August 1, 2024, all dogs entering the U.S. must be vaccinated against rabies, with additional certification required for dogs that visited a high-risk rabies country within the prior six months, per the CDC.

Is Animal Passport the same as a pet travel document for airlines?

No. Animal Passport is a biometric identity tool using muzzle prints to record an animal's owner, breed, estimated age, and body condition; it is not a government travel document and does not substitute for USDA or CDC paperwork required to fly.

How much does it cost to fly a pet on United Airlines?

The in-cabin pet fee is reported at $150 each way as of 2026, though travelers should confirm the current fee directly with United since airline pricing changes over time.

Animal Passport last updated this article in September 2026. Sources are listed below; airline policies change, so confirm current United Airlines pet rules directly at booking.