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

United Airlines transports pets in three ways: in-cabin (small pets, $125 each way), as checked baggage on select short-haul international flights ($200–$400), or via PetSafe cargo on most domestic and international routes ($379–$1,200+ depending on weight class and route). United accepts dogs, cats, household birds, and rabbits. Brachycephalic (snub-nosed) breeds and several restricted breeds are banned from cargo for safety reasons.

This guide breaks down United’s pet policy in plain English: real prices, weight limits, cabin vs cargo decisions, banned breeds, paperwork, and what to expect at check-in. Updated May 2026 directly from United’s published policy and current operator quotes.

United Airlines pet transport at a glance

• In-cabin (small pets): $125 each way. Pet + carrier must fit under the seat (combined weight typically ≤20 lb).
• PetSafe cargo: $379 minimum, scales by weight + route. Most cross-country dogs fall in $500–$900 range.
• Checked baggage: Limited to select international short-hauls. $200–$400.
• Banned from cargo: snub-nosed dogs (bulldogs, pugs, boxers, mastiffs) and snub-nosed cats (Persian, Burmese, Himalayan) per IATA Live Animals Regulations.
• Banned breeds entirely: Pit bulls and pit-bull mixes are restricted on most United international routes.

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. The combined weight of pet + carrier must allow the carrier to fit under the seat without bulging.

United’s published carrier dimensions: hard-sided 17.5″ x 12″ x 7.5″ or soft-sided 18″ x 11″ x 11″ (Sherpa Deluxe and similar IATA-compliant carriers fit). Soft-sided carriers can compress slightly to fit. Pets cannot be removed from the carrier in flight.

Fee: $125 per pet, each way. There’s no separate weight fee, but if the carrier doesn’t fit under the seat, the gate agent will require you to cargo-ship the pet (rare; usually only happens with oversized soft carriers).

In-cabin booking rules

• Maximum one in-cabin pet per passenger; United caps in-cabin pets per flight (typically 4 in main cabin, 2 in premium cabins).
• Book the pet at least 24 hours before flight via United’s reservations line (1-800-864-8331). The website doesn’t always allow add-on pet bookings.
• No in-cabin pets allowed on flights to Hawaii, Australia, NZ, UK, or Ireland regardless of size (quarantine country restrictions).
• Pets must be at least 8 weeks old (16 weeks for international).

PetSafe cargo: United’s program for larger pets

For pets too big for in-cabin (most dogs over 20 lb combined weight), United uses its PetSafe cargo program. PetSafe runs on most United mainline aircraft, with climate-controlled holds, vet-staffed transit hubs (Houston IAH, Cleveland CLE), and 24/7 monitoring.

Pricing scales by weight class and route. Real 2026 quotes pulled May 2026:

• Cat in IATA crate, JFK → LAX: $379–$425
• 20-lb dog (small Pomeranian/terrier), DEN → ORD: $425–$525
• 40-lb dog (Cocker spaniel-sized), DEN → ORD: $625–$725
• 70-lb dog (lab-sized), JFK → LAX: $850–$1,050
• 100-lb dog (large breed), cross-country: $1,100–$1,400
• International cargo, US → Europe: $1,400–$2,800 depending on weight class

Crate requirements

United enforces strict IATA Live Animals Regulations crate standards. The crate must be hard-sided plastic or aluminum, large enough for the pet to stand up fully, turn around, and lie down naturally, with metal hardware (no plastic latches), absorbent bedding, food/water dishes attached to the door, and ‘LIVE ANIMAL’ stickers. Crates that don’t meet spec are refused at check-in.

Our review of the best IATA-compliant pet transport crates covers crate models that pass United’s check-in routinely.

Banned breeds and brachycephalic restrictions

United banned brachycephalic (snub-nosed) breeds from PetSafe cargo in 2018 after multiple in-transit deaths. The restricted list:

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

These pets can fly in-cabin if they meet the size requirements. The cargo ban is absolute — not even seasonal exceptions.

Paperwork required for United pet transport

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

United pet transport vs alternatives

Cargo with United works well for healthy, non-snub-nosed pets on direct flights. It’s not the cheapest option for most cross-country US trips. A ground transport operator often beats United on price ($800–$1,500 cross-country) and stress, especially for older or anxious dogs. CitizenShipper, Pet Express, and similar marketplaces can match drivers in 24–48 hours.

For international, United is usually the right answer (or partner airline via the IATA Live Animals network). For brachycephalic breeds, ground transport is the only viable cross-country option.

Frequently asked questions

Sources: United Airlines pet policy (current as of May 2026), USDA APHIS live animal export requirements, IATA Live Animals Regulations 49th edition.