Pets on United in the Cabin: 2026 Fees, Carrier Sizes, and Rules

As of September 2026, pets on United in the cabin means a small domesticated cat or dog may ride with you in an approved hard- or soft-sided carrier that fits under the seat in front of you, for a published fee of $150 each way, according to United Airlines’ Traveling with pets page (archived December 2025). Pets on United in the cabin are the airline’s standard public option: United no longer accepts ordinary checked pets through PetSafe®, except for a narrow military and State Department cargo program. Space is limited, destination bans apply, and international trips add Centers for Disease Control and Prevention (CDC) and veterinary paperwork separate from the cabin fee.

This guide is published by Animal Passport for the Airlines & Flying With Pets cluster. It summarizes United’s in-cabin rules from primary airline and U.S. government sources, then clearly separates those airline and border rules from Animal Passport’s biometric livestock-identity product.

What “pets on United in the cabin” covers

Under United Airlines’ published cabin policy, eligible animals are cats and dogs only. The pet must remain in a closed, ventilated carrier under your seat for the entire flight. United states there are no published weight or breed limits for in-cabin pets; fit and carrier size control eligibility. Trained service animals follow a separate accessibility process and are not treated as paid cabin pets. Therapy and emotional support cats and dogs must fly as pets under the same carrier and fee rules, United’s Traveling with pets page states.

United’s PetSafe program is closed to the general public. Pets can only fly in cargo when traveling with certain active-duty military or State Department employees, United says. For most travelers, if the animal cannot fit under the seat, it cannot travel on United at all through the airline’s own channels.

How much do pets on United in the cabin cost?

United’s Traveling with pets page states pet tickets cost $150 each way. A simple round trip with one pet therefore adds $300 in pet fees before your own airfare, carrier purchase, or veterinary costs. Older third-party summaries still quote $125; that figure conflicts with United’s current published $150 rate and should not be relied on for budgeting.

On most flights you may bring up to two pets per person, but you must buy two seats if you bring two pets, and the second seat must be next to yours so you can care for both animals, United states. Some aircraft allow only one pet per person because under-seat space under the middle seat is limited: Airbus A319, A320, and A321neo, plus Boeing 737-800 / 737-8 (MAX 8) and 737-900 / 737-9 (MAX 9), according to the same United page.

Carrier size rules for United cabin pets

United requires a hard-sided or soft-sided carrier that fits under the seat. Maximum dimensions published on United’s Traveling with pets page (and mirrored on United Express airport partner guidance such as Kearney Regional Airport’s Flying from Kearney page) are:

• Hard-sided: 9 inches high × 17.5 inches long × 12 inches wide
• Soft-sided: 11 inches high × 18 inches long × 11 inches wide
• Boeing 737 MAX cabin note: pet carrier height may be no more than 10 inches

Your pet must be able to stand and turn around comfortably. Soft-sided carriers are widely preferred because they can compress slightly under the seat; a carrier that will not fit can lead to denied boarding, and with civilian cargo closed there is usually no same-airline fallback at the gate.

Seat restrictions also matter. United states you cannot sit with a pet in an emergency exit row, a United Premium Plus seat, or the front row of each cabin. On some Boeing 757 and 737 aircraft, Economy travelers with pets must use a window or aisle seat so the carrier fits. Each cabin also caps the total number of pets allowed on a flight.

How to book pets on United in the cabin

1. Select “Travel with a pet” as a traveler while booking on united.com, or add a pet later in My Trips for an existing reservation, United’s policy page states.
2. You cannot add a pet to your trip in the United app, according to the same page.
3. For international itineraries, call United to add the pet; partner-airline segments need each carrier’s own pet rules confirmed separately.
4. At the airport, check in at the ticket counter with your confirmation and your pet’s confirmation; United issues a special bag tag for the carrier.
5. Keep the pet in the closed carrier under the seat for the whole flight.

Pet space is first-come and limited. Book early, especially around holidays and on aircraft that allow only one pet per passenger.

Age, health certificates, and international paperwork

United’s published age minimums are: puppies and kittens at least 2 months old on domestic flights; dogs at least 6 months old on international flights to comply with CDC requirements; kittens at least 4 months old to comply with vaccination requirements.

For international travel on United, the airline requires rabies and health certificates for dogs and cats. Rabies vaccinations must be completed at least 28 days before travel for both dogs and cats, for all international travel to and from the United States, United states. United says it follows CDC country-risk guidance and recommends checking CDC requirements at least two months before departure.

Separately, the CDC regulates dog entry into the United States. As summarized in CDC’s Frequently Asked Questions on Dog Importations (updated August 27, 2026), all dogs entering or returning to the U.S. need a CDC Dog Import Form receipt; dogs from dog-rabies-free or low-risk countries must still appear healthy, have a readable microchip, and be at least 6 months old. Dogs that have been in high-risk countries in the prior six months face additional documentation and, in some cases, arrival only at airports with a CDC-registered animal care facility. CDC’s Bringing an Animal into the U.S. page notes that CDC does not require a general health certificate for U.S. entry, but airlines and some states may still require one—United’s international cabin rules are an example of an airline requirement layered on top of CDC rules.

The United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS) Pet Travel pages (last modified March 20, 2026) advise contacting a USDA-accredited veterinarian early when exporting a pet from the United States, because destination-country requirements and USDA-endorsed certificates take time. U.S. Customs and Border Protection (CBP) likewise reminds travelers that airline fees and kennel rules are separate from federal import rules administered with USDA, CDC, and the U.S. Fish and Wildlife Service (USFWS).

Where United does not allow cabin pets

United publishes a long list of states and countries where pets may not fly to, from, or through on United, including Australia, Hawaii, New Zealand, the United Kingdom, United Arab Emirates (Dubai), South Africa, Jamaica, Ireland, and many others (with limited footnotes for Guam, Bilbao, and certain Taiwan routings). Always re-check United’s destination list close to travel; quarantine jurisdictions change, and United’s list is not a substitute for destination government import rules.

Military and State Department cargo: not the cabin product

United’s Military Pet Program page (archived January 2026) states the airline helps active-duty U.S. military personnel, State Department Foreign Service Personnel, and their spouses transport dogs and cats in cargo while traveling on assignment between Guam and Honolulu. Without qualifying reassignment orders, United says the pet cannot travel in cargo. That exemption is unrelated to the $150 cabin ticket and does not reopen PetSafe for civilians.

Cabin pets vs. EU pet passports vs. Animal Passport

Animal Passport is a digital animal and livestock identity product that uses muzzle biometrics—a nose print unique like a fingerprint—captured on a phone. A record can bind owner, breed, estimated age (from a dental photograph with a confidence score), body condition score 1–5 (from a side-profile photo), and vaccination history. The product was used in livestock flood rescue in Pakistan in August 2025 so farmers could reclaim animals after paper tags washed away. It does not diagnose disease, does not provide legal advice, and is not a government-issued travel document unless an official source says otherwise—which current airline and U.S. border pages do not. For more field and identity context, see the Animal Passport blog.

Practical checklist before you fly

• Confirm your destination is allowed on United’s cabin-pet route list.
• Measure the carrier against United’s published maximums for your aircraft (including the 10-inch MAX height note).
• Add the pet early on united.com or My Trips; call for international bookings.
• For outbound U.S. international trips, line up a USDA-accredited veterinarian and destination entry rules via USDA APHIS Pet Travel guidance.
• For dogs returning to the U.S., complete the CDC Dog Import Form and meet age, microchip, and rabies-risk rules before you board.
• Pack airport essentials United recommends: collapsible water bowl, leash, treats, waste bags, and a familiar toy or blanket—while keeping the pet in the carrier as required.

Where sources disagree

Third-party pet-travel sites still sometimes list a $125 cabin fee, accept household birds, or describe open PetSafe cargo. United’s Traveling with pets page (December 2025 archive) states $150 each way, cats and dogs only for standard cabin pets, and PetSafe closed except for qualifying military and State Department cargo. Prefer United’s own page and CDC/USDA APHIS primary pages over outdated aggregator summaries when they conflict.

Last updated September 2026 by Animal Passport. Re-check united.com, CDC, USDA APHIS, and your destination government before every trip—airline and border rules change.