Flying with a dog or cat on United Airlines: small pets can fly in the cabin ($150 each way), and the hold is open only to pets of military and official travellers. Each answer links to United Airlines's own page.
Only cats and dogs can fly, and only in the cabin with you, if there is space. Most flights take up to 2 pets per person, but the second pet needs a second seat bought next to yours. You cannot sit with a pet in an exit row, a United Premium Plus seat or the front row of a cabin.
Source: United — Traveling with pets
$150 each way per pet. Choose "Travel with a pet" when booking on united.com, or add the pet to an existing trip in My Trips — not in the United app.
Source: United — Traveling with pets
Hard-sided carriers can be at most 9" x 17.5" x 12" and soft-sided carriers 11" x 18" x 11". The carrier must be ventilated and fit under the seat in front of you; on a Boeing 737 MAX it can be no more than 10" tall.
Source: United — Traveling with pets
United no longer lets you check pets through its PetSafe program. Pets fly in cargo only with certain active-duty military or State Department employees.
Source: United — Traveling with pets
United sets no weight or breed limits for pets travelling in the cabin, so snub-nosed breeds are accepted there as long as the carrier fits under the seat.
Source: United — Traveling with pets
Whatever the airline, the CDC requires every dog entering or returning to the US to be at least 6 months old, microchipped, healthy, and to travel with a CDC Dog Import Form receipt.
The CDC dog import rule, step by step →Airlines change pet fees and rules often, and limits can depend on the aircraft. Always confirm with United Airlines when you book — the linked pages are the final word.
