Flying With Your Dog: What You Need to Know Before Booking

Flying with a dog requires advance planning, airline-specific rules, and decisions about whether your dog flies in the cabin or cargo hold

Most airlines allow dogs to fly, but the rules differ sharply between carriers and depend on your dog's size, age, and health. A dog under 10 to 15 pounds typically flies in the cabin with you as a carry-on pet. Larger dogs usually travel in the pressurized cargo hold below, where the environment is temperature-controlled but your dog travels alone. Some airlines do not accept dogs in cargo at all, especially flat-faced breeds like bulldogs and pugs, which are at higher risk during flight.

You will need a health certificate from your veterinarian dated within 10 days of travel, proof of current vaccinations (particularly rabies), and a carrier or crate that meets airline dimensions. If you are flying internationally or to Hawaii, the rules are much stricter and can require quarantine, import permits, and additional testing weeks in advance. Start planning at least a month before your trip, because airline pet policies change and some carriers limit the number of pets per flight.

Key Takeaways

• Small dogs (typically under 15 pounds) fly in the cabin in an airline-approved carrier; larger dogs fly in cargo and cannot be accessed during the flight.
• You must obtain a health certificate from your vet within 10 days of departure, showing current vaccinations and that your dog is fit to fly.
• Flat-faced breeds (bulldogs, pugs, boxers) are restricted or banned by most airlines because they are prone to breathing problems at altitude.
• International flights and Hawaii require import permits, health testing, and sometimes quarantine — plan these routes three to four months ahead.
• Cabin pet fees range from $100 to $200 per flight; cargo fees are typically $300 to $500 one way, and policies vary by airline.

Cabin vs. cargo: which route your dog takes

If your dog weighs 10 to 15 pounds or less, most airlines allow it to travel in the cabin with you in a soft-sided carrier that fits under the seat in front of you. The dog stays with you during the flight, experiences the same air pressure and temperature as the cabin, and you can comfort it if needed. The tradeoff is a per-flight fee (usually $100 to $200) and strict size limits — the carrier itself must fit in the space, so you cannot bring a large dog this way no matter how much you pay.

Dogs over 15 pounds typically must fly in cargo, where they travel in a hard-sided crate in the pressurized hold. You cannot see or access your dog during the flight. Cargo fees are higher ($300 to $500 one way) and the experience is more stressful for anxious dogs. Some airlines do not accept dogs in cargo at all, and many restrict it during summer months when heat in the hold becomes dangerous. Brachycephalic breeds — flat-faced dogs like bulldogs, pugs, boxers, and Shih Tzus — are banned from cargo on most airlines because they cannot regulate their breathing well at altitude and are at serious risk of heat stroke.

A few airlines offer a middle option: a pet-in-cabin program for dogs up to 20 or 25 pounds, though this is less common and usually costs more. Check your specific airline's website for their weight cutoff and carrier dimensions before booking.

Health certificates and vaccination records

Every airline requires a health certificate signed by a licensed veterinarian, dated no more than 10 days before your flight. This is not the same as a vaccination record. The vet examines your dog in person, confirms it is healthy enough to fly, and issues an official certificate stating that. You will need to schedule this appointment before you book your flight, because some vets have limited availability and you need the certificate in hand to check in at the airport.

The certificate must show current rabies vaccination and any other vaccines your airline or destination requires. If you are flying domestically within the United States, rabies is the main requirement. If you are flying to another country or to Hawaii, the requirements expand significantly — some destinations require proof of microchipping, additional testing for diseases like brucellosis, and a waiting period after vaccination before travel is allowed.

Bring the original certificate and a copy to the airport. Some airlines scan it at check-in; others do not ask for it but you should have it in case of questions. If your dog has a chronic health condition or takes medication, mention this to your vet when you schedule the certificate appointment, because the vet may recommend against flying or suggest ways to make the flight safer.

Carriers, crates, and what fits on the plane

For cabin travel, you need an airline-approved soft-sided carrier that fits under the seat. Dimensions vary by airline but are typically around 17 inches long, 12 inches wide, and 8 inches tall. The carrier must be well-ventilated, have a solid bottom (not mesh), and allow your dog to stand, turn around, and lie down. Most soft-sided carriers designed for pets meet these specs, but check your airline's website for their exact requirements before buying one.

For cargo travel, you need a hard-sided airline-approved crate, usually a large plastic or wooden crate with ventilation holes on multiple sides. The crate must be large enough for your dog to stand, turn, and lie down, and it must have a secure latch that cannot be opened accidentally. The airline will provide a list of approved crate types and dimensions. Some airlines require you to attach food and water bowls to the inside of the crate, and you may need to include absorbent pads or newspaper in case of accidents during the flight.

Arrive at the airport with your carrier or crate already assembled and your dog acclimated to it. A dog that has never been in the carrier will be more stressed during the flight. Spend a few weeks before travel letting your dog spend time in the carrier with the door open, then closed, then in the car, so it feels familiar.

International flights and Hawaii: different rules entirely

Flying to another country or to Hawaii involves import regulations that are far more complex than domestic travel. Hawaii requires a health certificate, rabies vaccination, and a microchip, but also has a quarantine period (usually 5 to 30 days depending on the dog's vaccination history and the country you are coming from). Some countries require an import permit obtained weeks in advance, a health certificate from a USDA-accredited veterinarian, and proof of specific vaccinations or disease testing.

The process typically takes two to four months of planning. You will need to contact the destination country's agriculture or animal health department to learn their specific requirements, then work with your vet to ensure your dog meets them. Some vets specialize in international pet travel and can guide you through the paperwork. If you miss a deadline or a requirement, your dog may not be allowed to enter the country, and you could be forced to return home with your dog or leave it in quarantine at your own expense.

For Hawaii specifically, the state has a 5-day-or-less quarantine program if your dog meets specific criteria (microchip, rabies vaccination at least 30 days before travel, health certificate, and sometimes additional testing). This is faster than the standard 30-day quarantine but still requires advance planning and paperwork filed with the Hawaii Department of Agriculture.

Booking your flight and managing the day of travel

Call the airline directly to book your pet, rather than booking online. Many airlines have a limited number of pet spots per flight (often just two to four dogs in the cabin), and these fill up quickly. When you call, confirm the pet fee, the carrier dimensions, and any restrictions for your dog's breed or age. Ask whether the airline requires advance notice or a separate pet reservation form.

Arrive at the airport at least three hours early for a flight with a pet. You will need to check in at the ticket counter (not a kiosk) so the airline can see your dog and verify your health certificate. If your dog is flying in cargo, you will drop it off at the cargo desk, which is usually separate from the main ticket counter. Ask the cargo agent how long before your flight you need to arrive and whether you can say goodbye to your dog before it is loaded.

On the day of travel, do not feed your dog a large meal right before the flight — a light meal two to three hours before departure is better. Bring water and a collapsible bowl so your dog can drink at the airport. If your dog is anxious, ask your vet about anti-anxiety medication; some vets recommend giving it an hour or two before the flight. Never give your dog sedatives without veterinary guidance, because sedation can be dangerous at altitude.

For cargo flights, attach a collar and leash to your dog before drop-off, and include a recent photo of your dog in the crate in case it escapes during handling. Some airlines allow you to include a blanket or toy with your dog's scent to reduce stress.

Breed restrictions and health considerations

Flat-faced breeds are restricted or banned by most airlines because they have narrower airways and cannot cool themselves as efficiently as other dogs. Breeds commonly restricted include bulldogs, French bulldogs, pugs, Shih Tzus, Pekingese, boxers, and Boston terriers. Some airlines ban these breeds from cargo entirely; others allow cabin travel only. A few airlines have no restrictions, but they are the exception. If you have a flat-faced dog, call airlines directly to find one that will accept it, and expect to pay higher fees.

Dogs with heart conditions, respiratory disease, or seizure disorders may not be cleared to fly by your vet, even if the airline allows them. Older dogs and puppies under 16 weeks are also sometimes restricted. Your vet's health certificate is the final word — if your vet will not sign off on the flight, the airline will not accept your dog, and pushing the issue puts your dog at risk.

Pregnant dogs and dogs in heat are usually not allowed to fly. If your dog is on medication, bring enough for the trip plus extra in case of delays, and keep it in its original labeled bottle with your dog's name on it.

Frequently Asked Questions

Can my dog fly in the cabin if it weighs more than 15 pounds?

Most airlines do not allow dogs over 15 pounds in the cabin, but a few carriers permit dogs up to 20 or 25 pounds. Check your specific airline's policy. If your dog exceeds their limit, cargo is the only option, though some airlines do not accept dogs in cargo at all.

What if my dog has anxiety or gets motion sickness?

Talk to your vet about anti-anxiety medication or motion sickness prevention before the flight. Some vets recommend medication an hour or two before departure. Never sedate your dog without veterinary guidance, because sedation can be risky at altitude. Acclimating your dog to the carrier weeks in advance also helps reduce stress.

Do I need a health certificate if I am flying within the United States?

Yes, every airline requires a health certificate dated within 10 days of travel, even for domestic flights. Schedule this with your vet before you book your flight. The certificate is not the same as a vaccination record — your vet must examine your dog and sign the official certificate.

What happens if my dog gets sick during the flight?

If your dog is in the cabin with you, alert a flight attendant immediately. If your dog is in cargo, the crew will monitor it, but you will not know there is a problem until landing. This is one reason to have your dog examined by your vet before flying and to avoid flying if your dog has any health concerns.

Can I bring my dog's food and water on the plane?

You can bring an empty collapsible bowl and fill it with water at airport water fountains or ask a flight attendant for water. You can bring dry food in a sealed container, but most people do not feed dogs during short flights. For longer flights, ask your airline whether you can bring food into the cabin or whether it must be packed in cargo with your dog.