United Airlines Pet Policy 2026: Fees, Carrier Rules and Tips

Airline pet policies change, and details vary by route and aircraft. This guide explains the main points to check about United's pet policy, but always confirm current rules, fees and carrier sizes on united.com or with United before you book.

The basics

United generally allows small dogs and cats in the cabin, in an approved carrier that fits under the seat in front of you. Check United's current baggage allowance; do not assume the carrier replaces your normal carry-on.

Fees

United's official pet policy lists $150 each way for an in-cabin pet as checked October 14, 2026. Confirm the current total, route restrictions and any additional charges directly before booking.

Carrier rules

The carrier must fit under the seat in front of you
Your pet must be able to stand, turn around and lie down
Soft-sided and hard-sided carriers have different maximum dimensions. United lists the current size limits on its website, so measure your carrier against them
The carrier must be leakproof and well ventilated
Your pet must stay in the carrier during the flight

Other rules to check

Age minimums for pets
Number of pets allowed per flight and per carrier, which is limited, so book early
Cabin restrictions: pets are not permitted in every cabin or seat type
Destination restrictions: some countries and airports have special rules
Breed and temperature restrictions for certain pets, especially in extreme heat or cold
Cargo options: United no longer checks pets through PetSafe; cargo transport is limited to qualifying active-duty military or State Department arrangements

Documents

Prepare:

A health certificate, if required for your route, often issued within a set number of days before travel
Rabies and vaccination records
International: certificates and endorsements required by the destination

Keep digital copies in your Waggle Vault and carry the originals. To schedule a health certificate exam, find a vet near me.

Tips for United travel day

Reserve your pet's spot when you book, since spaces are limited
Confirm any additional steps with the airline a few days before
Arrive early for check-in
Plan for pet relief areas at your airport and on layovers
Keep your pet's ID tags current, and microchip registration up to date
Pack water, a collapsible bowl and pads

Prepare your pet

Practice with the carrier at home. Do not rely on sedatives, which many vets advise against for air travel. If your pet is anxious, talk to a licensed vet on Waggle Vet before you fly. Check current Waggle Vet access and eligibility terms.