United Airlines Pet Transport: In-Cabin, PetSafe Cargo, Cost & Banned Breeds [2026]

United Airlines accepts cats and dogs in-cabin for $150 each way, with the pet plus carrier fitting fully under the seat. United closed its PetSafe cargo program to the general public in 2018, and as of 2026 it has not reopened: civilian cargo pet shipping is not available, and United cargo is limited to active-duty military PCS moves and US State Department orders. For a dog too large for the cabin, civilians use a licensed IATA pet shipper or ground transport.

This guide breaks down United's current pet policy in plain English: the in-cabin fee and carrier rules, why cargo is no longer an option for most travelers, banned destinations, paperwork, and what to do for a large dog. Verified May 2026 against United's published policy.

Need to compare United to other airlines side-by-side? Use our airline pet policy comparison tool.

Comparing carriers? Our American Airlines pet transport guide breaks down the other major option, and how to transport a pet covers every method.

Policies change, so verify before booking on United's official traveling-with-pets page. For airline policies side by side, see our pet airlines hub.

Flying a different carrier? Our guide to Qatar Airways Pet Policy breaks down that airline's pet fees and rules.

Flying a different carrier? Our guide to Turkish Airlines pet policy breaks down that airline's pet fees and rules.

See also Flying With a Large Dog in Cabin.

For a deeper dive, see our guide to alaska airlines pet policy in 2026: cabin fees, pet connect cargo, and restrictions.

Related reading: pet cargo vs in-cabin: which is safer and cheaper for your dog?.

If you are weighing your options, our guide to how to crate-train your dog for travel: a week-by-week acclimation plan goes further.

Important 2026 update: PetSafe cargo is closed to the general public

This is the single most important thing to know before planning a United pet move. United suspended its PetSafe cargo program in 2018 after a run of in-transit incidents, and as of 2026 it has not been reinstated for general civilian use. United cargo pet transport is now limited to two groups:

• Active-duty US military traveling on PCS (Permanent Change of Station) orders, via United's dedicated military pet program.
• US State Department / Foreign Service employees traveling under official orders.

If you are a civilian moving a pet too large for the cabin, you cannot book United cargo. Your options are a licensed pet-shipping company that meets IATA Live Animals Regulations, or ground transport, which for most large dogs is now both cheaper and lower stress than air cargo ever was.

United pet transport: current verified rules at a glance

Compare United's policy against every other major US carrier in the sortable table below.

In-cabin pets on United: rules, fees, and the carrier dimensions that matter

United allows in-cabin pets on most domestic and many international flights. The pet must remain in an airline-approved carrier under the seat in front of you for the entire flight, and cannot be removed from the carrier in flight. The combined weight of pet plus carrier must allow the carrier to fit under the seat without bulging.

United publishes two carrier limits and gate agents enforce them. Hard-sided carriers max out at 17.5" x 12" x 9". Soft-sided carriers max out at 18" x 11" x 11". A soft carrier can compress slightly to slide under the seat, which is why most in-cabin travelers choose soft over hard. If the carrier bulges or will not fit, the gate agent can deny boarding, and with cargo closed to civilians there is no fallback at the airport.

Fee: $150 per pet, each way. There is no separate weight fee. Measure your under-seat clearance for your specific aircraft before you fly, and pick a carrier from our best pet transport crate guide that lists confirmed in-cabin dimensions.

In-cabin booking rules

• Maximum one in-cabin pet per passenger. You may bring a second pet only by purchasing a second adjacent seat. United also caps in-cabin pets per flight.
• Book the pet at least 24 hours before flight via United's reservations line (1-800-864-8331). The website does not always allow add-on pet bookings.
• No in-cabin pets allowed on flights to Hawaii, Australia, New Zealand, the UK, or Ireland regardless of size (destination quarantine restrictions, not United policy).
• Pets must be at least 8 weeks old for domestic travel and 16 weeks for international.

What civilians should actually do for a large dog

Because cargo is off the table for civilians, the decision tree for a dog too big for the cabin is straightforward:

1. Brachycephalic breed? Ground transport, always. Snub-nosed breeds are barred from air cargo across US carriers anyway because of their elevated breathing-related risk.
2. Large but healthy dog, cross-country? Compare a licensed IATA pet-shipping company against dedicated ground. Ground frequently wins on both price and stress for 1,000+ mile moves, often $800–$1,500 cross-country.
3. International move? Use a professional pet-relocation company that books cargo on carriers still running civilian pet cargo, and budget 30–180 days for destination paperwork.
4. Small dog or cat under the carrier limit? In-cabin on United at $150 each way is the simplest path.

Marketplaces like CitizenShipper and similar operators can match drivers in 24 to 48 hours. For carrier-by-carrier differences, compare against our American Airlines pet transport guide, and for the full cost picture see best pet transport companies 2026.

Brachycephalic and breed restrictions

Even before the broader cargo closure, United banned brachycephalic (snub-nosed) breeds from cargo in 2018 after multiple in-transit deaths. These breeds remain barred from cargo across the US airline industry. The commonly restricted list:

• Dogs: Boston terrier, boxer, bulldog (English, French, American), bull terrier, cane corso, chow chow, dogue de bordeaux, English toy spaniel, Japanese chin, lhasa apso, mastiff (any breed), pekingese, pug, shih tzu, Tibetan spaniel
• Cats: Burmese, Himalayan, Persian, exotic shorthair

These pets can still fly in-cabin if they meet the carrier size limits. For a snub-nosed dog too large for the cabin, ground transport is the only safe cross-country option.

Paperwork for flying a pet

• Health certificate (CVI) from a USDA-accredited vet. Most domestic US flights accept a 30-day CVI; international flights require one issued within 10 days of departure.
• Rabies vaccination certificate for dogs and cats, current and at least 30 days old (puppies under 16 weeks may have different rules).
• USDA APHIS endorsement for international flights. Get this at a USDA Veterinary Services office after the vet issues the CVI.
• Destination country import permit if applicable. Australia, Hawaii, the UK, and Japan all have specific permits and timelines.

How United compares to American and Delta on pets

United is the strictest of the big three US carriers on pets, because it is the only one with no civilian cargo path. American and Delta both still carry in-cabin pets, and the practical differences come down to fee, carrier sizing, and what happens when a dog is too large for the cabin. The table below sets the three side by side so you can pick the carrier that actually fits your pet, not just your route.

For the full breakdown of each, read our American Airlines pet transport guide and our Delta Airlines pet transport guide. If the only thing that matters is keeping the bill down, our cheapest way to transport a pet guide compares every method by real cost, not sticker price.

Measuring your pet before you measure the carrier

United enforces its under-seat carrier limits at the gate, so the carrier has to fit the aircraft. But the carrier also has to fit your pet, and that is where most first-time flyers get it wrong. The pet has to be able to stand up, turn around, and lie down naturally inside the closed carrier. A carrier that slides under the seat but cramps the animal will not be approved, and it is genuinely unsafe.

The International Air Transport Association publishes the sizing formula the whole industry uses. Measure your pet from the tip of the nose to the base of the tail (call this A) and the height from the ground to the top of the head or ear tip when standing (call this B). The internal container length should be A plus half of B, and the internal height should clear B with room to stand. United's soft-sided ceiling is 18 inches long, so in practice a pet whose A-plus-half-B figure exceeds roughly 17 inches will not travel in cabin and needs a different plan. The full method is on the IATA Traveler's Pet Corner.

A realistic documentation timeline

Domestic and international United pet trips run on completely different clocks. Treating an international move like a domestic one is the most common reason a pet gets turned away at check-in. Work backward from your flight date using the windows below, and remember that gate agents check dates, not intentions.

• 90 to 180 days out (international only): confirm the destination country's import rules and microchip and rabies titer requirements. Some countries require a rabies blood test drawn months before arrival, so this is the deadline that quietly ends most rushed moves.
• 30 days out (domestic): a health certificate from a USDA-accredited vet is typically valid for 30 days on domestic flights, so this is the earliest useful window for a domestic trip.
• 10 days out (international): international health certificates are usually valid for only 10 days, and many need a USDA endorsement after the vet signs, so book the vet and the endorsement appointment together.
• 3 to 5 days out: confirm the in-cabin booking by phone, since United caps pets per flight and the seat can sell out even when yours is paid for.
• Day of travel: carry the original signed paperwork, not a photo, plus the rabies certificate and any import permit.

For a step-by-step on the certificate itself, see our pet health certificate for travel guide. If your pet is re-entering the United States, the CDC sets the dog import rules, including current rabies and entry conditions, on its bringing a dog into the US page.

What drives the real cost of a United pet trip

The $150 each-way in-cabin fee is the only number United advertises, but it is rarely the only number you pay. The hidden cost drivers are the carrier itself (an airline-compliant soft carrier runs $40 to $90), the vet visit and health certificate ($60 to $250 depending on whether a USDA endorsement is needed), and, for anything larger than a small dog, the entire alternative of professional shipping or ground transport because United cannot carry the animal at all. A two-leg round trip with a connection can also mean the fee applies per direction, not per trip, so confirm how your itinerary counts before you assume $300 covers it.

Pre-flight checklist for a United in-cabin pet

• Confirmed the pet plus carrier fits fully under the seat for your specific aircraft, with no bulging.
• Booked the pet by phone and have a confirmation number, not just a paid fee.
• Health certificate dated inside the valid window (30 days domestic, 10 days international).
• Carrier is leak-proof, ventilated on at least two sides, and labeled with your contact details.
• Pet has done several practice sessions in the closed carrier at home, since a calm pet is far easier than a panicked one in flight.
• No sedatives unless a vet specifically directs it. Sedation is discouraged for air travel because it can impair breathing and balance at altitude, a position the American Veterinary Medical Association and IATA both hold.
• Withheld a large meal a few hours before the flight, with water available up to departure.

Carrier-specific in-cabin etiquette differs slightly between species: our flying with a dog in cabin and flying with a cat in cabin guides cover the small details that make the difference on a full flight. If your dog is a snub-nosed breed, read snub-nosed dog breeds flying ban before you book anything, because the in-cabin option may be your only one.

Frequently asked questions

Sources: United Airlines traveling-with-pets policy (verified May 2026), USDA APHIS live animal export requirements, IATA Live Animals Regulations.