Flying United with a dog? Good news first: cabin travel is on the table, so your dog can ride under the seat beside you rather than down in the hold. The science here is simpler than it sounds, and this guide breaks United's rules into quick checks. Pixel, my Cavalier, has done enough boarding gates to know the drill cold. Let's get your paperwork airtight.

United Airlines's pet policy splits into cabin and cargo. This page summarizes the weight limits, fees, brachycephalic-breed restrictions, and carrier specifications for both modes — sourced from the airline's official pet pages.

How United Airlines handles your pet

Each fact comes straight from the operator’s published policy. Tap the to read the exact wording; the opens the source page.

In the cabin Accepted
Snub-nosed breedsNot accepted

Cabin policy

Pets accepted Acceptedverified 2026-08-17
Minimum age8 weeksverified 2026-08-28
Max pets per passenger2verified 2026-07-14
Booking methodContact Centerverified 2026-06-09
Heat embargo27°Cverified 2026-08-28
Banned destinations Yesverified 2026-08-14
Max per flight4verified 2026-07-20
Aircraft restrictions Yesverified 2026-07-14
Carrier size44 × 30 × 19 cmverified 2026-08-29
Crate must have/behard-sided ok, soft-sided ok, ventilated, IATA-compliant, absorbent liner, live-animal label, a carrierverified 2026-08-29

Hold & cargo policy

Hold: Snub-nosed breeds banned Yesverified 2026-08-12
Hold: Minimum age8 weeksverified 2026-08-28
Hold: Crate must have/beventilated, IATA-compliant, absorbent liner, live-animal labelverified 2026-08-13
Cargo: Max pets per flight4verified 2026-07-20
Cargo: Crate must have/behard-sided ok, water bowl, ventilated, IATA-compliant, absorbent liner, live-animal label, a carrierverified 2026-07-20

Health & documents

Health certificate required Yesverified 2026-08-13
Health certificate validity10 daysverified 2026-08-24
Health certificate validity30 daysverified 2026-08-21
Microchip · Required Yesverified 2026-08-24
Quarantine · Pre-approval required Yesverified 2026-08-15
Health certificate · Issuera licensed veterinarianverified 2026-08-28
Health certificate · Required Yesverified 2026-08-24
Rabies vaccination · Required Yesverified 2026-08-15
Rabies vaccination · Min age at vaccination8 weeksverified 2026-08-24
Health certificate valid within days · Health certificate valid within days10 daysverified 2026-08-13

Other rules

Minimum age8 weeksverified 2026-08-28
Assistance animals accepted Yesverified 2026-08-19

Service & assistance animals

Esa noteemotional support dogs are not recognizedverified 2026-08-19
Recognized Yesverified 2026-08-24
Cabin allowed Yesverified 2026-08-28
Esa recognized Noverified 2026-07-14
Forms required Yesverified 2026-07-20
Advance notice hours48 hoursverified 2026-08-20
Documentation required Yesverified 2026-07-20
United sets a hard floor on age: dogs in the cabin must be at least 8 weeks old. On domestic flights, puppies under 2 months are turned away at check-in. Confirm the puppy's date of birth before booking. Carry documentation showing the dog has passed 8 weeks. Book travel for a date after that threshold, not before it.
United applies no breed limitations to cabin dogs, so snub-nosed breeds are not banned from the cabin. Do not assume a brachycephalic breed disqualifies the booking. Book the cabin slot regardless of breed. Verify the carrier fits under the seat, since size and fit rules still apply even where breed restrictions do not.
United charges a cabin pet fee of 150 USD each way. A round trip means paying 150 USD outbound and 150 USD on the return. Budget 300 USD total for both legs. Pay the fee at check-in or during booking. Add this cost to the fare when comparing the true price of flying the dog.
United says yes to cabin dogs, keeps snub-nosed breeds welcome, and asks for a microchip plus that 8-week minimum age. Sort those before you book and the gate becomes easy, the way Pixel makes friends with every customs officer. Ready for your exact route and dates? Build a personalized plan with Pawgo's plan-builder and get every requirement laid out step by step.
Get YOUR personalized plan for United Airlines →

Glossary

ISO chip
ISO 11784/11785 — the universal microchip standard.
FAVN
Fluorescent Antibody Virus Neutralization — a rabies serology test required by rabies-free destinations.
Brachycephalic
Snub-nosed breeds (French Bulldogs, Pugs, Persians, Himalayans) with restricted airline acceptance due to heat-stress risk.
AVIH
Animal Vehicle In Hold — IATA's term for cargo pet shipment, with fees that vary by carrier and route.