Airline Pet Policy
United keeps pet travel simple in concept: a small dog or cat, in a carrier, under the seat in front of you. The details are where people get caught out, the fee that's only charged at the airport, the carrier that has to fit a specific box, the destinations where your pet can't fly at all, and the cargo option that no longer exists for ordinary travelers. Here's the whole policy, current for 2026.
In this guide
If you only read one section, read this one.
| In-cabin fee | $150 each way, per carrier, paid at the airport |
| Allowed pets | Cats and dogs only |
| Cargo / checked | Not available for civilian travelers |
| Carrier max (hard) | 17.5" x 12" x 9" |
| Carrier max (soft) | 18" x 11" x 11" |
| Minimum age | 2 months domestic; 4 (cats) or 6 (dogs) months international |
| Pets per passenger | Up to 2 (each needs its own carrier and seat) |
| Banned destinations | UK, Australia, Hawaii, Guam, UAE |
| How to book | Add at booking or call United; cabin space is limited |
United accepts only cats and dogs as pets, and only in the cabin. The animal travels in a carrier that stays closed and stowed under the seat in front of you for the entire flight. It does not come out, and it cannot ride on your lap or in a seat.
The big change to understand: United no longer offers cargo or checked-baggage pet transport for ordinary travelers. The old PetSafe program now serves only active-duty military on PCS orders and State Department personnel on official orders. For everyone else, if your pet doesn't fit in an under-seat carrier, it can't fly United. Large dogs simply aren't an option on this airline.
One more thing that catches people out: United no longer recognizes emotional support animals. An animal that used to fly free as an ESA now travels as a standard pet, with the standard fee and all the standard carrier rules. Only trained service dogs are exempt, under separate Department of Transportation rules.
United charges $150 each way for an in-cabin pet, as of 2026. The fee rose from $125 on April 26, 2024, so tickets purchased before that date may still carry the older rate.
A few specifics worth knowing before you reach the counter:
Budget beyond the fee. For international trips, the $150 is just the start. A veterinary health certificate runs $50 to $150, USDA endorsement adds cost, and some destinations charge import fees. A realistic round-trip international total lands well above the headline number.
The carrier is the part United enforces most strictly, and where travelers most often get turned away. It must fit fully under the seat in front of you, and your pet must be able to stand up, turn around, and lie down inside it.
| Carrier type | Maximum dimensions |
|---|---|
| Hard-sided | 17.5" x 12" x 9" (44 x 30 x 22 cm) |
| Soft-sided | 18" x 11" x 11" (45 x 27 x 27 cm) |
Soft-sided carriers are usually the safer choice, they flex into the under-seat space, which varies by aircraft. The carrier counts as your carry-on bag, so traveling with a pet means giving up your overhead carry-on allowance; you keep a personal item.
Under-seat space is not uniform. Travelers report pets being denied boarding over carrier size even after flying successfully before, because the space differs between aircraft and agents enforce it differently. On some configurations, like certain Boeing 757-200 layouts, a pet passenger may be required to take a window seat. Measure your carrier against United's current limits and arrive early.
For domestic flights, puppies and kittens must be at least 2 months old. For international flights, cats must be at least 4 months and dogs at least 6 months, the dog requirement aligns with the US CDC rule for returning to the country.
United does not publish a hard weight limit for in-cabin pets, the limit is functional: the animal has to fit comfortably in a compliant carrier under the seat. That naturally rules out larger dogs regardless of breed.
Flat-faced (brachycephalic) breeds such as bulldogs, Boston terriers, Persians, and Himalayans are a grey area for in-cabin travel and are generally advised against because of the breathing risks these breeds face in flight. If you have a snub-nosed breed, confirm acceptance with United directly before booking, since guidance varies and the safest assumption is that it may be refused.
Even with the fee paid and the carrier compliant, some destinations simply don't allow in-cabin pets, and United will deny boarding rather than fly you to a border where your pet can't enter. As of 2026, in-cabin pets are not accepted to or from:
These restrictions exist because the destinations themselves ban in-cabin animal entry or impose strict quarantine. If you're heading somewhere with tough entry rules, the airline policy is only half the puzzle, the country's own requirements are the other half. See our guides on the pet passport and country entry rules to plan the full picture.
Cabin pet spots are limited and assigned first-come, so the booking step matters as much as the paperwork.
The airline rules are only the start of an international trip. The destination country sets its own entry requirements, and those are usually the harder part.
For most international routes where in-cabin pets are allowed, you'll need a veterinary health certificate, typically issued within a tight window before travel, often endorsed by the USDA, plus up-to-date rabies vaccination and a microchip. Dogs returning to the US now also need a CDC import form. Strict destinations can require months of preparation, including titer tests and waiting periods.
Start with the country, not the airline. Confirm what your destination requires before you book the flight, because some requirements take months. Our guides on the USDA health certificate and rabies titer test cover the documents that take the longest to arrange.
United's in-cabin fee sits at the higher end of the major US carriers. But fee alone is a poor way to choose, carrier size limits, route availability, and how reliably the booking process works all matter as much as cost.
| Airline | In-cabin fee (each way) | Notes |
|---|---|---|
| United | $150 | Generous carrier size; no cargo for civilians |
| American | $125 | Similar in-cabin model |
| Alaska | $100 | Cheapest of the majors; has a cargo option |
| Delta | $95 domestic / $200 intl | Lowest domestic fee |
United's carrier size limits are slightly more generous than Alaska's, which can matter for owners of larger small-breed dogs. If price is your only concern, Delta and Alaska win domestically. If carrier room or your specific route is the priority, United can still be the better fit.
United charges $150 each way for an in-cabin pet as of 2026, paid at the airport check-in counter rather than online. The fee is per carrier and per direction, so a round trip costs $300. Tickets bought before April 26, 2024 may still carry the older $125 rate. Long layovers add $125 per stop.
No, not if you're a civilian traveler. United ended its PetSafe cargo program for the general public; it now serves only active-duty military on PCS orders and State Department personnel on official orders. For everyone else, pets must travel in the cabin in an under-seat carrier, which means large dogs cannot fly United at all.
Hard-sided carriers can be up to 17.5" x 12" x 9", and soft-sided carriers up to 18" x 11" x 11". The carrier must fit fully under the seat in front of you, and your pet must be able to stand, turn around, and lie down inside it. Soft-sided carriers are usually safer because they flex into the under-seat space, which varies by aircraft.
Yes. United allows cats in the cabin under the same rules as dogs: a carrier that fits under the seat, the $150 each-way fee, and minimum ages of 2 months for domestic and 4 months for international flights. The cat stays in the carrier for the whole flight. Snub-nosed cat breeds like Persians and Himalayans may be refused due to breathing risks.
No. United does not accept in-cabin pets to or from Hawaii, the United Kingdom, Australia, Guam, or the UAE. These destinations ban in-cabin animal entry or impose strict quarantine, and United will deny boarding rather than fly you somewhere your pet can't enter. You'd need a specialist pet relocation service and must meet the destination's own entry requirements.
Select "Travel with a pet" when booking on united.com, or add it afterward through My Trips. Pets can't be added through the United app. Because cabin pet spots are limited and first-come, add your pet as soon as your own ticket is booked. Then check in at the counter on travel day to pay the fee and get your carrier tag.
United's pet policy, fees, and carrier limits are set by the airline and change. Figures here reflect publicly reported policy as of June 2026. Always confirm the current rules with United directly before booking, especially fees, aircraft-specific carrier limits, and breed acceptance.
United is one of many carriers on most routes. See which airlines take your pet in the cabin, with fees and carrier limits side by side, before you book.
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