United Airline Pet Policy: Fees, Carrier Sizes, and Cargo Limits Explained

As of September 2026, the United airline pet policy lets small cats and dogs fly in the cabin for $150 each way when space is available, according to United Airlines’ Traveling with pets page. Pets must stay in an approved hard- or soft-sided carrier under the seat. United no longer offers PetSafe cargo shipping to the general public; hold transport is limited to certain active-duty military and U.S. Department of State travelers. This guide summarizes fees, carrier sizes, seating limits, blocked destinations, and health paperwork from primary sources.

The United airline pet policy is United Airlines’ set of rules for carrying companion cats and dogs on United and United Express flights. It is an airline service policy, not a government travel document. As of September 2026, United Airlines publishes the in-cabin fee as $150 per line of flight on its Upgrades and Optional Service Charges page, matching the Traveling with pets page.

Byline: Animal Passport Editorial. Last updated: September 14, 2026. Always reconfirm rules on united.com before you book, because aircraft types, destination lists, and public-health forms change.

What the United airline pet policy covers

United Airlines states that if you plan to fly with a pet, the animal must be a cat or a dog and must stay in the cabin with you when space is available. Therapy and emotional support cats and dogs fly as pets under the same carrier rules, United Airlines explains on its Service animals page. Only task-trained service dogs travel free under separate accessibility rules.

United Airlines also states it no longer lets customers check pets through the PetSafe program. Pets can fly in cargo only when traveling with certain active-duty military or State Department employees under United’s Military Pet Program. That distinction matters: most civilians cannot move a large dog as United cargo.

We no longer let you check your pets through the PetSafe program. Pets can only fly in cargo when traveling with certain active-duty military or State Department employees. — United Airlines, Traveling with pets (as retrieved September 2026)

ABC News reported in March 2018 that United Airlines suspended new PetSafe cargo reservations indefinitely after cargo mishaps and related incidents. As of September 2026, United’s public pet page still directs general travelers to in-cabin travel only.

United in-cabin pet fee and how to book

United Airlines lists pet tickets at $150 each way for cats or dogs. The same $150 “per line of flight” amount appears on United’s Upgrades and Optional Service Charges schedule. Older travel articles sometimes cite $125; that figure is outdated relative to United’s current published fee tables.

To reserve space:

1. Select “Travel with a pet” while booking on united.com, or add a pet later in My Trips.
2. Do not rely on the United app—United Airlines states you cannot add a pet there.
3. Call United to add a pet on international itineraries.
4. Confirm space early; flights cap how many pets may board each cabin.

On most flights, United Airlines allows up to two pets per person if you buy two adjacent seats so each carrier has under-seat space. United Airlines restricts travelers to one pet per person on Airbus A319, A320, and A321neo aircraft and on Boeing 737-800, 737-8 (MAX 8), 737-900, and 737-9 (MAX 9) aircraft because middle-seat under-seat space is limited.

Carrier size limits under the United airline pet policy

United Airlines states there are no published weight or breed limits for in-cabin pets, but the carrier must fit under the seat in front of you. Dimensions published on United’s Traveling with pets page as of September 2026 are:

Some older secondary guides still list a 7.5-inch hard-sided height. United’s current official graphics and captions use 9 inches high for hard-sided carriers. If a secondary site disagrees with united.com, follow United Airlines’ page and measure your aircraft’s under-seat clearance.

Operational rules United Airlines emphasizes:

• The pet must remain in a closed, ventilated carrier under the seat for the entire flight.
• Only service animals may board without a pet carrier.
• You cannot sit with a pet in an emergency exit row, a United Premium Plus seat, or the front row of each cabin.
• On Boeing 757-200 Economy, United requires a window seat so the carrier fits.
• On certain 737 Economy seats, United requires an aisle or window seat.

How many pets per cabin?

United Airlines publishes cabin caps that vary by aircraft. Examples from the Traveling with pets FAQ include up to four pets in Economy on many narrow-body types, up to three on Embraer ERJ 175 Economy, and up to six in Economy on Boeing 767, 777, and 787 aircraft. Premium cabins on selected types may allow up to two pets. These caps, plus the per-person limits above, explain why early booking matters.

Age minimums under United rules

United Airlines states that on domestic flights, puppies and kittens must be at least 2 months old. On international flights, dogs must be at least 6 months old to comply with U.S. Centers for Disease Control and Prevention (CDC) requirements, and kittens must be 4 months old to comply with vaccination timing. Those airline age floors sit on top of destination entry laws.

Destinations where United does not allow in-cabin pets

United Airlines publishes a list of states and countries where pets may not fly to, from, or even through, including Hawaii, Australia, New Zealand, the United Kingdom, the United Arab Emirates (Dubai), Hong Kong, the Philippines, South Africa, and many others. United notes limited Guam exceptions for some outbound itineraries and special Bilbao and Taiwan footnotes. Because the blocked list is long and footnote-heavy, check the current Traveling with pets page for your exact routing before you buy nonrefundable fares.

Health certificates, rabies, CDC, and USDA APHIS

Airline acceptance is only half of pet travel. Entry and exit rules come from governments.

United Airlines requires health and vaccination certificates for dogs and cats on all international flights, including Canada and Mexico. United Airlines states rabies vaccinations must be completed at least 28 days before travel for both dogs and cats. For U.S. domestic trips, United encourages a veterinary certificate of health that lists owner contact details, pet identifiers, and recent vaccines, because some destinations may request it on arrival.

The U.S. Centers for Disease Control and Prevention (CDC) is the primary U.S. authority for dog imports. CDC requirements depend on where the dog was vaccinated and which countries the dog visited in the six months before entry. CDC directs travelers to its Dog Importation Navigator and warns that unvaccinated dogs from high-risk rabies countries will not be allowed to enter the United States.

The United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS) advises travelers exporting a pet from the United States to contact a USDA-accredited veterinarian early for destination-country tests, vaccinations, and any USDA-endorsed health certificate. USDA APHIS also notes that CDC leads dog-import rules for animals entering or returning to the United States. United Airlines additionally flags USDA screwworm-related certificates for dogs from affected regions and New World Screwworm inspection rules for dogs entering Mexico.

None of those government forms is the same product as a commercial biometric livestock ID app. An EU pet passport under European Union pet-travel schemes, a USDA-endorsed export certificate, and a United Airlines pet reservation are separate instruments. Do not treat any of them as interchangeable.

Service dogs versus pets on United

United Airlines permits only dogs trained to perform tasks for a person with a disability as service animals on United and United Express. Domestic service dogs must be over 4 months old; international service dogs must be at least 6 months old. United Airlines allows up to two qualifying service dogs free of charge, subject to forms such as the Service Animal Training and Behavior Attestation Form and, for flights of eight hours or more, a relief attestation form. Emotional support and therapy animals are not service animals under United’s published policy and must follow the paid in-cabin pet rules.

Military and State Department cargo exception

United Airlines confirms pet exemptions for U.S. military members on permanent change of station and their spouses, and for State Department foreign service officers and their spouses, via the Military Pet Program. United’s June 2022 Military Pets Customer Acknowledgement Form requires a licensed veterinarian health certificate dated within 10 days of travel, familiarity with International Air Transport Association (IATA) live-animal rules, and acceptance of cargo-travel risks. That narrow program does not reopen PetSafe for ordinary leisure or household moves.

If your dog is too large for an under-seat carrier and you are not eligible for the military exception, you will need another airline that still accepts pets as cargo, a licensed pet shipper, or ground transport. United’s published civilian path is cabin-only.

How Animal Passport relates—and how it does not

Readers searching the United airline pet policy sometimes also look for “pet passports.” Those searches mix three different ideas:

• United Airlines pet tickets and carrier rules (this article).
• Official government travel documents, such as destination veterinary certificates, CDC dog-import forms, or an EU pet passport under EU pet movement rules.
• Animal Passport, a digital animal and livestock identity product that uses muzzle biometrics (a nose print unique like a fingerprint), phone-based capture, and records that bind owner, breed, estimated age, body condition, and vaccination history.

Animal Passport can estimate age from a dental photograph with a confidence score and score body condition from 1 to 5 using a side-profile photo. In August 2025, the product was used in livestock flood rescue in Pakistan so farmers could reclaim animals after paper tags washed away. It is not a United Airlines boarding pass, not a USDA or CDC form, and not a government-issued travel passport unless an official source says otherwise—which none of the airline or U.S. government pages cited here do.

For more livestock-identity reporting, see the Animal Passport blog. For United flights, keep government certificates and your united.com pet reservation as the documents that actually clear the gate.

Practical checklist before you fly United with a pet

1. Confirm your destination is not on United’s blocked pet list.
2. Reserve the pet on united.com or My Trips and pay the $150 each-way fee.
3. Measure the carrier against United’s published hard- and soft-sided limits and your aircraft type (especially Boeing 737 MAX height).
4. Choose an allowed seat: avoid exit rows, Premium Plus, and front rows; follow window or aisle rules by aircraft.
5. Gather rabies and health paperwork for international trips at least 28 days after rabies vaccination when United requires that timing.
6. If returning to the United States with a dog, complete current CDC importation steps and any USDA APHIS requirements.
7. Arrive early; United prints a special carrier tag at check-in kiosks for domestic flights.
8. Keep the pet inside the closed carrier from lobby to landing.

Comparing cabin pets, service dogs, and cargo exceptions

This comparison reflects United Airlines’ published pages as of September 2026. Partner airlines on codeshare segments apply their own rules; United Airlines tells customers to verify each operating carrier.

Experience note from Animal Passport’s field work: paper tags and single photocopies fail in disasters and in crowded travel corridors. For livestock identity after floods, biometric records helped reclaim animals in Pakistan in August 2025. For United passenger flights, the durable checklist is still the airline reservation plus veterinary and CDC or USDA paperwork—not a consumer ID app alone.

Bottom line: under the United airline pet policy as published in September 2026, plan for a $150 each-way cabin fee, strict under-seat carrier dimensions, early space booking, and government health forms on international trips—while treating PetSafe retail cargo as closed unless you qualify for United’s military or State Department exception.