How to Fly with Pets in 2026

Flying with a pet is more involved than it used to be. Airline policies have tightened, the difference between cabin and cargo travel is significant, and the specific rules vary by airline, breed, and destination. The framework below covers the most common scenarios — small dogs and cats in cabin, larger pets in cargo — and the travel-day logistics that keep pets safe.

Cabin vs cargo decision. Pets traveling in cabin are limited to small enough to fit under the seat in front of you (typically a hard or soft carrier under 18 x 11 x 11 inches) and below airline weight limits (usually 15–20 lbs combined pet + carrier). Larger pets travel in cargo, in a separate climate-controlled compartment. Cabin is dramatically less stressful for the pet and is the only option with most experienced pet owners. Cargo is sometimes necessary for larger breeds but adds real complexity and risk — many airlines have suspended cargo pet travel entirely after high-profile incidents.

Airline policies that matter. Most US airlines limit cabin pets per flight (typically 4–7 pets total, first-come-first-served when booking). Reserve the pet space at the moment you book the human ticket. Pet fees range from $95 to $200 each way per pet on US carriers. Specific carrier rules: Delta, American, Alaska, JetBlue, and Southwest all accept small cabin pets; United is currently the most restrictive. International carriers vary — Lufthansa and KLM are pet-friendly with established programs; many Asian carriers have stricter rules.

International travel with pets. Each destination has its own entry requirements, often involving a USDA-endorsed health certificate, specific vaccinations, and sometimes a quarantine period. The EU has a unified pet passport system. The UK has specific rules for bringing pets via cargo (no cabin pet travel into the UK from outside the country). Hawaii has strict quarantine rules. Japan, Australia, and New Zealand have very strict requirements that often need 3–6 months of advance preparation. Start the international pet travel research at least 6 months before the trip — some requirements have lead times that can't be shortened.

Pre-flight veterinary visit. A health certificate from a USDA-accredited veterinarian within 10 days of travel (some destinations require shorter windows) is required for most flights. The certificate confirms vaccination status, general health, and travel fitness. The vet visit is also when you'd discuss whether sedation is appropriate for your pet's specific situation — most veterinarians now recommend against sedation for cargo pets because it can increase respiratory and cardiovascular risk during flight. Cabin pets sometimes benefit from mild calming supplements like Solliquin, but consult the vet for your specific animal.

Travel-day logistics. Don't feed your pet for 4 hours before the flight (reduces likelihood of motion sickness). Provide fresh water access throughout. Walk the dog right before checking in. The carrier should be familiar to the pet — start carrier training weeks before travel, not the day of. Bring an absorbent pad inside the carrier in case of accidents. Pack a small bag with the pet's food, treats, water bowl, and any necessary medications.

At the airport. Get to the airport extra early for pet travel — there's an additional check-in process for pets that adds 30–45 minutes. Don't sedate cabin pets unless your vet specifically recommends it. Some airports now have pet relief areas inside security; check the airport's website. The TSA will require you to remove the pet from the carrier at the security checkpoint while the carrier goes through X-ray; bring a small leash or harness. Pet-specific travel insurance covers vet emergencies en route — Pet Travel Insurance and similar providers offer policies for international pet travel.

What not to do: don't fly brachycephalic breeds (pugs, bulldogs, French bulldogs, Persian cats) in cargo — they have higher mortality rates due to respiratory issues at altitude. Don't fly during extreme heat (most airlines won't accept cargo pets when temperatures at any airport on the route exceed 85°F). Don't book a tight connection — pet transfers between flights add delay risk. Don't book the cheapest flight if it adds connections; nonstop is dramatically less stressful for pets.