United Airlines Pet Fee: What It Costs and What It Covers in 2026

The United Airlines pet fee is $150 each way for a small dog, cat, or rabbit traveling in an approved carrier in the passenger cabin, charged in addition to the owner's own ticket. This fee applies per carrier at check-in and does not include a seat for the animal, since the carrier must fit under the seat in front of the passenger. United does not currently offer a general public option for larger pets to travel in the cargo hold.

This guide explains exactly what the United Airlines pet fee covers, how it compares to cargo shipping and service-animal rules, and where owners commonly get tripped up on cost.

How Much Is the United Airlines Pet Fee?

United charges $150 each way to bring a small pet into the cabin, according to United's published pet travel policy as reflected across pet-travel resources including CitizenShipper (2026) and TravelReadyPets (2026). That means a round-trip flight with one pet costs $300 in pet fees on top of the human passenger's airfare. The fee is collected when the pet is added to the reservation, either online through the "Travel with a Pet" option or at check-in, and it is non-refundable once the pet has traveled.

Some sources report an additional fee -- commonly cited around $125 -- for itineraries with a long layover (roughly more than 4 hours domestically or 24 hours internationally), since the pet effectively needs a second boarding. Because layover fee amounts and thresholds are reported inconsistently across secondary sources, confirm the current figure directly with United before booking a connecting itinerary.

What the Fee Covers -- and What It Doesn't

• Covers: One pet (or occasionally two small pets sharing one carrier, at the discretion of the airline) traveling in the cabin, in an approved hard- or soft-sided carrier stowed under the seat.
• Does not cover: A seat for the pet, checked-baggage allowance changes, veterinary paperwork, or international entry requirements.
• Does not cover: Cargo-hold transport. United suspended its PetSafe cargo program for the general public in March 2018 after a series of high-profile incidents, including animal deaths and misrouted pets, according to reporting from the travel outlet One Mile at a Time (2018). United said at the time the pause did not affect in-cabin pet transport, only cargo.

Carrier Size and Eligibility Rules

United restricts in-cabin pets to dogs, cats, and (on some routes) rabbits that fit comfortably in a carrier stowed under the seat in front of the passenger. Reported carrier dimensions vary somewhat between pet-travel aggregator sites -- figures such as roughly 18 x 11 x 11 inches for soft-sided carriers and slightly different hard-sided limits both appear in current guides. Because United periodically adjusts these specifications, treat any third-party dimension chart as a starting point and verify exact current limits on united.com or with a United reservations agent before purchasing a carrier.

Commonly reported eligibility rules include:

• Puppies and kittens generally must be at least 8 weeks (2 months) old for domestic travel and older for international travel, per multiple pet-travel guides.
• The carrier counts as the passenger's one carry-on item; a separate carry-on bag is typically not permitted in addition to the pet carrier.
• Snub-nosed (brachycephalic) breeds such as pugs, bulldogs, and Persian cats face additional restrictions on some airlines, particularly for any cargo or extreme-temperature conditions.

United generally treats the pet-plus-carrier combination as a single carry-on allowance, which is why airlines cap both carrier dimensions and, on many policies, the combined weight of the animal and its carrier. Because reported weight caps also vary across secondary guides, owners with a pet close to the limit should weigh the pet and carrier together at home and confirm the current cap with United before travel rather than relying on a single third-party chart.

United Airlines Pet Fee vs. Cargo vs. Service Animals

Why United Suspended Cargo Pet Transport

United's PetSafe cargo program was paused in March 2018 following a string of widely reported incidents in a short period: a dog died after a flight attendant required its carrier be placed in an overhead bin, another dog was mistakenly flown to Japan instead of its intended destination in Kansas, and a third pet was loaded onto the wrong flight, according to reporting compiled by the travel outlet One Mile at a Time (2018). At the time, United said it would consult independent pet-safety experts and add new procedures, including advance notice of any animal in the cargo hold and mandatory ramp-supervisor oversight during loading and unloading. The review period was originally set to end May 1, 2018, but a public cargo option for pet owners has not returned in the years since, and as of August 2026 cargo transport remains limited to active-duty military personnel on Permanent Change of Station (PCS) orders and U.S. State Department employees on official assignment.

Service Animals Fly Free -- Pets Don't

Only trained service dogs are exempt from the pet fee, consistent with the U.S. Department of Transportation's Air Carrier Access Act framework, which since 2021 has recognized dogs specifically as service animals for air travel and no longer requires airlines to accommodate emotional support animals as a distinct category. Passengers traveling with a service dog may be asked to complete a DOT-issued attestation form rather than pay the standard pet fee. This is a legal accommodation for disability, not a discount on pet travel -- a family pet, even a well-behaved one, is still billed the standard $150 fee.

International Trips Add Costs Beyond the Airline Fee

The $150 United Airlines pet fee only covers the airline's own carriage charge. International travel with a pet typically requires separate, additional steps handled outside the airline: a rabies vaccination certificate, a veterinary health certificate issued close to departure, an ISO-compliant microchip, and -- for U.S. pets leaving the country -- an endorsement from the United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS). Destination countries set their own entry rules on top of this, and some destinations restrict or prohibit in-cabin pet arrivals entirely.

Travelers heading to the European Union should not confuse United's cabin fee with the EU pet passport. The EU pet passport, issued under the EU's PETS-style framework, is a government identification and health document for dogs, cats, and ferrets, valid for the animal's lifetime as long as records are kept current. It requires ISO microchipping, a rabies vaccination given after 12 weeks of age, and a 21-day wait after vaccination before travel, according to the EU's official "Your Europe" citizen portal. That passport is issued by an authorized veterinarian under EU law -- it is not something an airline sells, and it does not replace United's own carrier and fee rules for the flight itself.

How Animal Passport's Biometric ID Fits -- and Doesn't

Animal Passport, the product behind this site, is a separate tool from both United's cabin fee and the EU government pet passport. It's a phone-based digital identity record that uses a muzzle biometric scan -- comparable to a fingerprint -- to bind an animal's identity to its owner, along with an estimated age from a dental photo and a body condition score 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 not a government-issued travel document, does not provide veterinary diagnoses, and does not substitute for USDA APHIS or EU pet passport paperwork required to fly or cross a border. For owners who want a persistent, tamper-resistant identity record for a pet or livestock animal alongside their official travel documents, more detail is available on the Animal Passport homepage and in ongoing coverage on the Animal Passport blog.

How to Book a Pet on a United Flight

1. Book the human passenger's ticket first, since pet space on each flight is limited and allocated on a first-come basis.
2. Add the pet to the same reservation online through United's pet travel option, or call United reservations if the route or fare type does not support adding a pet online.
3. Pay the $150 each-way pet fee at the time the pet is added, or at airport check-in if the airline requires it there instead.
4. Bring the pet in its carrier to check-in so the carrier can be tagged and verified against under-seat size limits before heading to the gate.
5. For international itineraries, complete destination-country paperwork (health certificate, microchip proof, USDA APHIS endorsement where required) well before departure, since airline check-in staff will not resolve missing government paperwork on the spot.

Tips to Avoid Surprise Charges

1. Add your pet to the reservation in advance through United's website rather than assuming a gate agent can accommodate a walk-up pet, since cabin space for pets is limited per flight.
2. Measure your carrier against United's current published dimensions before travel day -- reported figures vary across guides, so check united.com directly.
3. Budget separately for veterinary paperwork and, for international trips, USDA APHIS endorsement fees, which are billed by the government or your vet, not by United.
4. If connecting through a long layover, ask United directly whether an additional layover-related fee applies to your specific itinerary.
5. Do not assume an emotional support animal designation waives the fee -- U.S. airlines, including United, treat ESAs as standard paying pets.

As of August 2026, United Airlines' cargo pet program remains closed to the general public, more than eight years after its March 2018 suspension -- travelers with pets too large for the cabin generally need to use a specialized pet-shipping company instead of the airline itself.