Flying With Pets: Airline Rules and What US Regulators Require

Pet air travel involves several kinds of requirements: airline acceptance policies, animal-welfare standards, service-animal rules and destination health rules. A booking that satisfies one layer may still fail another. Start with the animal's fitness to travel and the entire itinerary, then check the applicable official requirements before purchasing transport.

The framework includes DOT reporting and service-animal rules, USDA animal-welfare and travel requirements, CDC dog-entry rules, and airline-specific acceptance policies. The result is a patchwork that travelers routinely underestimate.

What the DOT actually requires

The most consequential federal requirement is incident reporting. Under 14 CFR Part 235, adopted after Congress mandated it in the Wendell H. Ford Aviation Investment and Reform Act of 2000, US carriers operating scheduled passenger service with aircraft of more than 60 seats must report any incident involving the loss, injury or death of an animal during air transport.

Those reports are due within 15 days after the end of each month and are published by the DOT, giving the public a running — if imperfect — ledger of animal incidents by carrier. A 2014 final rule broadened the mandate, extending it to carriers defined by fleet capacity and expanding the definition of an animal to cover any dog or cat shipped commercially, not just household pets. ^[1]

The required contents are standardized. Each filing must include:

• the carrier and flight number
• the date and time of the incident
• a description of the animal
• identification of the owner or guardian
• a narrative description of what happened

Part 235 covers custody from tender to return for covered carriers and applies to all their scheduled passenger flights, including those operated with smaller aircraft. It excludes animals accompanying a passenger at their seat when the carrier does not take custody. Published reports are therefore not a census of every pet journey, and incident counts alone should not be used to rank risk without comparable transport totals.

The DOT also writes the rules for service animals. Its 2020 final rule under the Air Carrier Access Act recognizes only dogs individually trained to perform tasks for a person with a disability; airlines must accept them in the cabin without charge, may require the DOT's standardized service animal form in advance, and may deny animals that are out of control. Emotional support animals lost their special status in that rulemaking and now travel as pets. ^[2]

Cabin versus cargo

In-cabin acceptance is subject to the operating airline's current rules for species, carrier dimensions, placement, reservations and fees. Check these directly for the actual flight. A carrier advertised as airline-approved is not a guarantee of acceptance by a particular airline or on a particular aircraft.

Where cargo programs still fly

Cargo or checked transport is a separate service from carrying a pet under the seat. Ask which program accepts the species and route, where the animal is tendered and collected, and what happens during a connection or cancellation. Airline programs and eligibility change; an old description of a suspended service is not a current booking confirmation.

Breed, temperature and route restrictions need to be checked with the actual operator. Flat-faced animals may face special restrictions because of respiratory concerns. Discuss fitness to fly with the veterinarian; acceptance by a carrier does not establish that the trip is a good medical choice for a particular animal.

Health papers and border rules

Health certificates and endorsements depend on species, destination, transit countries and transport arrangements. Check USDA APHIS destination guidance and the carrier's requirements together. Ask when an examination and certificate must occur and whether government endorsement is required. A certificate issued for a previous trip may not satisfy a new itinerary.

The CDC, not the airlines, controls what dogs need when they cross into the United States. Since August 1, 2024, its dog import rule has required every arriving dog to be at least six months old, microchipped, healthy on arrival and accompanied by a CDC Dog Import Form receipt, with additional rabies documentation for dogs that have recently been in countries classified as high-risk for dog rabies. Airlines have embedded those checks into check-in for any itinerary touching a US border.

USDA APHIS administers applicable Animal Welfare Act transport requirements and provides pet-travel guidance. These responsibilities are different from DOT incident reporting. It is inaccurate to say federal rules address paperwork but impose essentially no housing or transport protection. The existence of standards also does not mean that every pet journey is risk-free. ^[3]

Why the patchwork persists

Before booking, map the journey rather than only the flight number. Include ground transport, check-in location, time in custody, connections and collection arrangements. Ask what happens if weather prevents loading or a flight is cancelled. A short flight can still involve a long period away from the owner, and separate providers may have different responsibilities.

Keep copies of the acceptance confirmation, health documents and contact details for each handover. If an incident occurs, seek veterinary care as needed and preserve the transport records. Reporting obligations, compensation questions and clinical needs are separate issues. The purpose of checking the rules beforehand is to identify those responsibilities while there is still time to choose a suitable plan.