Flying With Your Dog: Cabin, Cargo, and Everything In Between

Flying with a dog is doable, but the rules are more complicated than most people expect. Every airline has different size limits, breed restrictions, fees, and carrier requirements. Here’s how it actually works, stripped of the vague advice you’ll find on airline FAQ pages.

Cabin vs. Cargo

In-Cabin (Under the Seat)

Dogs that fit in an airline-approved carrier under the seat in front of you can fly in the cabin. This is the preferred option when possible because your dog stays with you, the cabin is climate-controlled, and the experience is generally less stressful.

The limits are strict:

• Combined weight (dog + carrier) typically maxes out at 20 lbs, though some airlines cap at 17 lbs
• Carrier dimensions must fit under the seat, usually around 17” x 12” x 8”, though dimensions vary by aircraft
• Only one pet per passenger on most airlines
• The carrier must stay closed and under the seat during takeoff, landing, and turbulence

Airlines charge $95 to $200 each way for in-cabin pets. This is not refundable and is separate from your ticket.

Cargo (Checked Baggage or Freight)

Dogs too large for cabin travel fly in the cargo hold, which is pressurized and temperature-controlled (the same system that keeps the cabin comfortable). Cargo has a worse reputation than it deserves, but it isn’t risk-free.

Temperature restrictions apply: most airlines won’t fly dogs as cargo when ground temperatures at departure, arrival, or layover cities exceed 85°F or drop below 45°F. This means summer and winter flights frequently get canceled or rerouted.

Cargo fees range from $200 to $500+ each way depending on crate size and distance.

Breed Restrictions

Brachycephalic breeds (French Bulldogs, English Bulldogs, Pugs, Boston Terriers, Pekingese, and others) are banned from cargo on nearly all US airlines. Their compromised airways make the stress and temperature variations of cargo travel dangerous. Several brachycephalic dogs have died in cargo holds, leading to industry-wide bans.

Some airlines also restrict brachycephalic breeds from cabin travel. Check your specific airline’s pet policy before booking. Policies change frequently and aren’t always consistent between the airline’s website and what the reservations agent tells you.

Airlines that currently allow some brachy breeds in-cabin (verify before booking):

• JetBlue (French Bulldogs, Pugs allowed in cabin)
• Southwest (most breeds allowed in cabin if they fit)
• Delta (in-cabin only, no cargo for snub-nosed breeds)

Step-by-Step Process

1. Check the Airline’s Pet Policy

Every airline has a pet policy page. Read the actual document, not a third-party summary. Look for:

• Weight and carrier size limits
• Breed restrictions
• Number of pets allowed per flight (airlines cap the total)
• Required documentation (health certificate, vaccination records)

2. Book Early and Add Your Pet

On most airlines, you add the pet to your reservation by calling the airline directly. You typically can’t add a pet online. Airlines limit the number of in-cabin pets per flight (usually 2 to 4), and spots fill up. Book the pet reservation as soon as you book your flight.

3. Get a Health Certificate

Most domestic flights require a veterinary health certificate (USDA APHIS Form 7001 or equivalent) issued within 10 days of travel. International flights require additional documentation including an international health certificate, and some countries require rabies titer tests months in advance.

Your vet will examine the dog, verify vaccinations are current, and sign the certificate. Cost is typically $50 to $150.

4. Prepare the Carrier

For cabin travel, the carrier needs to:

• Be airline-approved (soft-sided carriers work best for fitting under seats)
• Have mesh ventilation on at least two sides
• Be large enough for the dog to stand, turn around, and lie down
• Have a leak-proof bottom

For cargo, you need an IATA-approved hard-sided crate with:

• Metal hardware (zip ties and plastic clips don’t qualify)
• “Live Animal” stickers and directional arrows
• Food and water dishes attached to the inside of the door
• Absorbent bedding

5. Day of Travel

Arrive early. Allow an extra 30 to 45 minutes beyond your normal routine. Feed your dog 4 to 6 hours before the flight to reduce nausea risk. Offer water up until you leave for the airport.

At security, you’ll need to remove the dog from the carrier, hold the dog, and send the carrier through the X-ray machine. Have a leash ready for this step. Put the dog back in the carrier immediately after clearing security.

What to Skip

Sedation

The American Veterinary Medical Association advises against sedating dogs for air travel. Sedatives affect respiration and blood pressure at altitude, and a sedated dog can’t brace against turbulence or reposition in the carrier. If your dog is too anxious to fly without sedation, driving may be the safer option.

Emotional Support Animal Loopholes

As of 2021, US airlines are no longer required to accommodate emotional support animals in the cabin. Only trained service dogs (task-trained for a disability) fly free in the cabin under the Air Carrier Access Act. ESA letters from online services no longer grant cabin access.

Alternatives to Flying

For dogs that are too large for cabin travel, brachycephalic, or anxious flyers:

• Driving works for distances under 1,000 miles and eliminates most of the stress
• Pet transport services (CitizenShipper, uShip Pet Transport) hire ground drivers who transport your dog door-to-door
• Pet-friendly Amtrak routes allow dogs under 20 lbs on most Northeast Corridor trains

Frequently Asked Questions

Can my dog fly internationally?

Yes, but the requirements vary dramatically by country. Some countries (Australia, UK, Japan, New Zealand) require months of advance preparation including rabies titer testing with a waiting period. Others (Canada, Mexico, most EU countries) are relatively straightforward with a current health certificate and rabies vaccination. Start planning international travel at least 4 months in advance.

What if my dog barks during the flight?

Flight attendants can ask you to control your pet. If the dog is disruptive and can’t be calmed, you could be asked to keep the carrier closed and potentially be denied future pet travel on that airline. Practice carrier time at home before the flight so your dog is comfortable being enclosed for several hours.

Is it safe to fly a puppy?

Most airlines require puppies to be at least 8 weeks old and fully weaned. Some require 12 weeks minimum and current vaccinations. For very young puppies, the flight itself is usually tolerable, but the stress of travel combined with an immature immune system increases risk. Consult your vet before flying with any puppy under 16 weeks.