How Do I Fly With My Dog? A Step-by-Step Guide

To fly with your dog, book a pet-friendly flight in advance, buy an airline-compliant carrier, get a veterinary health certificate if your route requires one, and arrive early to clear airport security together. Most U.S. airlines cap in-cabin pets at around 20 lbs (9 kg) combined carrier weight and charge $95–$200 each way. Larger dogs typically cannot fly cargo anymore on major U.S. carriers and need alternate transport. The exact steps depend on whether you're flying domestically, internationally, or into the United States or European Union.

Quick Answer: Steps to Fly With Your Dog

1. Check your airline's pet policy first. Airlines, not the government, set carrier size, weight limits, breed restrictions, and fees.
2. Confirm your dog meets the minimum age. Dogs must be at least 8 weeks old and fully weaned before flying, per the International Air Transport Association (IATA) Live Animals Regulations (LAR), the edition effective January 1, 2026.
3. Buy an airline-compliant carrier. It must let your dog stand, turn around, and lie down naturally, and fit fully under the seat in front of you for in-cabin travel, per IATA's passenger guidance.
4. Book your pet's spot separately. Most airlines cap the number of in-cabin pets per flight, so pet space is first-come, first-served.
5. Get a veterinary health certificate if required. Interstate travel and nearly all international travel require a certificate issued by a USDA-accredited veterinarian, per the United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS).
6. Check import rules for your destination. Entering or re-entering the U.S. requires a CDC Dog Import Form receipt; entering the EU as a non-resident requires an EU animal health certificate rather than a pet passport, per the Centers for Disease Control and Prevention (CDC) and the European Commission.
7. Prepare for airport security. Your dog comes out of the carrier and walks through the metal detector on a leash (or is carried), while the empty carrier goes through the X-ray machine, per the Transportation Security Administration (TSA).
8. Arrive early and pack documents, water, and a light pre-flight meal. IATA recommends feeding a light meal about two hours before travel and continuing to offer water until departure.

Can My Dog Fly In the Cabin?

Whether your dog can ride in the cabin with you depends almost entirely on size and the airline you book, not federal law. There is no single U.S. government-set weight limit for in-cabin pets; each airline decides. As an example, Delta Air Lines recommends a soft-sided kennel with maximum dimensions of 18" x 11" x 11" that fits fully under the seat in front of you, with ventilation on three sides for domestic flights and four sides for international flights, per Delta's official pet travel policy. Delta also requires dogs to be at least 8 weeks old for domestic travel.

If your dog is too large for an under-seat carrier, in-cabin flight generally isn't an option on major U.S. airlines in 2026. Airline cargo pet programs for the general public have largely disappeared: Delta, United, and American Airlines have each scaled back or ended civilian cargo pet shipping, reserving checked-cargo pet travel mainly for active-duty military and U.S. State Department personnel on official orders, according to airline policy summaries reviewed for this guide. If cargo isn't available, options include ground pet transport services, driving, or leaving a large dog with a trusted caregiver.

Do I Need a Health Certificate to Fly With My Dog?

For domestic flights within a single state, airlines may not require paperwork, but many still ask for proof of vaccination. For interstate travel and almost all international travel, you need a Certificate of Veterinary Inspection (commonly called a health certificate) issued by a USDA-accredited veterinarian, per USDA APHIS. Start the process as soon as you book, since some destination countries require the certificate to be issued and endorsed within a narrow window before departure (often 10 days for EU entry, per the European Commission), and APHIS endorsement can take time to process.

If you're flying your dog into the United States — including U.S. citizens returning from abroad — the CDC, not USDA, sets the entry rules. Every dog must have a CDC Dog Import Form receipt, and requirements vary depending on where the dog was vaccinated and which countries it visited in the prior six months, per the CDC. Dogs arriving from CDC-designated high-risk rabies countries face additional rules, and unvaccinated dogs from those countries cannot enter the U.S. at all. The CDC's online Dog Importation Navigator tool can help identify which rules apply to your specific trip.

How Does This Differ for the European Union?

The EU pet passport is not a universal pet travel document — it is only issued to pet owners who are legal residents of an EU country, per the European Commission's official guidance. To get one, your dog must already be microchipped (chipped before or at the time of vaccination), and must have a rabies vaccination given no earlier than 12 weeks of age, with a wait of at least 21 days after that vaccination before travel.

If you are not an EU resident — for example, a U.S. traveler bringing a dog to Europe on vacation — you cannot use an EU pet passport. Instead, you need an EU animal health certificate, issued by an official government veterinarian no more than 10 days before arrival, per the European Commission. Dogs traveling to Finland, Ireland, Malta, Norway, or Northern Ireland also need tapeworm (Echinococcus) treatment documented between 24 and 120 hours before arrival. Dogs coming from countries not on the EU's approved list may also need a rabies antibody titer test with a required waiting period before travel.

EU Pet Passport vs. EU Animal Health Certificate vs. Animal Passport

What Happens at Airport Security With a Dog?

At the TSA checkpoint, your dog must come out of its carrier. You carry your dog through the walk-through metal detector, or walk them through on a leash, while the empty carrier goes through the X-ray machine on the belt, per the Transportation Security Administration (TSA). Never place a pet directly into the X-ray tunnel. After screening, a TSA officer typically swabs your hands for an explosive trace detection check, and the TSA notes that travelers with anxious pets can request a private screening room instead of the open checkpoint.

Where Muzzle-Biometric Identity Fits In

None of the documents above track an animal's unique physical identity the way a passport photo does for a person. That gap is what Animal Passport was built to close for livestock and companion animals: a phone-based digital record built around muzzle biometrics, since a dog's or cow's nose print is unique like a human fingerprint. The same phone capture also records an estimated age from a dental photograph with a confidence score, and a body condition score from 1–5 based on a side-profile photo, binding all of it to the owner, breed, and vaccination history in one record.

This kind of biometric record has already proven useful when paper documents fail entirely. In August 2025, flooding in Pakistan washed away paper ear tags used to identify livestock, and farmers used muzzle-biometric matching to reclaim their animals after the water receded, since the nose print stayed intact and matchable even when every paper record was gone. That is a livestock-identity use case, not an airline or customs document — Animal Passport does not replace a USDA health certificate, a CDC Dog Import Form, or an EU pet passport, and it makes no veterinary-diagnosis or legal-travel-document claims. For related identity and travel-document explainers, see the Animal Passport blog.

Domestic vs. International Flight Checklist

Frequently Asked Questions

How do I fly with my dog for the first time?

Book directly with the airline and add your dog to the reservation as soon as possible, since in-cabin pet spots are limited per flight. Buy a carrier that meets the airline's exact size limits, confirm whether a health certificate is required for your route, and arrive early to allow time for the TSA pet screening process.

What size dog can fly in the cabin?

Generally only dogs small enough to fit, with their carrier, entirely under the seat in front of you — commonly a combined weight limit around 20 lbs (9 kg), though exact limits vary by airline. Delta, for example, recommends a carrier no larger than 18" x 11" x 11", per Delta's official pet travel policy.

Do I need a health certificate to fly with my dog domestically?

It depends on the airline and whether you're crossing state lines. Many airlines still require proof of current vaccinations even for in-state flights, and interstate travel generally requires a certificate from a USDA-accredited veterinarian, per USDA APHIS.

Can my dog fly in cargo?

On most major U.S. airlines as of 2026, general cargo pet shipping for civilians has ended; Delta, United, and American have each limited checked-cargo pet travel mainly to active-duty military and State Department relocations. Some cargo-specific carriers and specialty pet transport services still exist outside the major passenger airlines.

What happens to my dog at airport security?

Your dog must leave the carrier and either be carried through the metal detector or walked through on a leash, while the empty carrier is X-rayed separately, per the Transportation Security Administration (TSA). You can request a private screening room if your dog is anxious in public.

Is an EU pet passport the same as a USDA health certificate?

No. An EU pet passport is issued only to EU residents by an authorized EU vet, per the European Commission. A USDA health certificate is issued by a USDA-accredited veterinarian for travel out of the U.S. or across state lines, per USDA APHIS. Non-EU residents entering the EU need an EU animal health certificate instead of a pet passport.

Is Animal Passport an official travel document for flying with my dog?

No. Animal Passport is a non-governmental, phone-based biometric identity record using muzzle (nose print) photos, a dental-photo age estimate, and a body condition score. It is not a substitute for a USDA health certificate, a CDC Dog Import Form, or an EU pet passport, and it makes no legal-travel-document or veterinary-diagnosis claims.

How early should I book a flight with my dog?

As early as possible. Most airlines cap the number of in-cabin pets allowed per flight on a first-come, first-served basis, and international health certificates often must be issued close to the travel date, so early planning avoids being shut out of both the flight and the paperwork window.

As of September 2026, airline pet fees, carrier limits, and international entry rules continue to change year over year, so confirm current requirements directly with your airline and the relevant government agency (USDA APHIS, CDC, or the European Commission) before you book.