Flying with Your Dog in 2026

The biggest mistake dog owners make is shopping airfare first and pet logistics second. Reverse that order. Before you book, confirm whether your dog can travel in cabin, must travel in a climate-controlled baggage compartment, or would need cargo service. For many U.S. airlines, in-cabin travel is limited to dogs small enough to stay inside a closed carrier under the seat for the entire flight. American Airlines, for example, recommends a soft-sided carrier up to 18 x 11 x 11 inches and charges $150 each way for a carry-on pet. If your dog is too large for cabin travel on American, the airline routes pet-only transport through American PetEmbark cargo; checked pets are generally limited to active-duty U.S. military and State Department personnel on official orders. Southwest allows only small vaccinated domestic dogs and cats in the cabin, limits pet carriers to six per flight on a first-come, first-served basis, and does not transport pets in cargo at all. Alaska offers both in-cabin and baggage-compartment options, with fees ranging from $100 to $200 each way depending on route and travel type. Choose nonstop flights whenever possible, avoid tight connections, and verify whether a partner or codeshare segment changes the pet rules, because the operating airline’s policy controls the trip.

Airlines care less about your dog’s weight than whether the dog can stand, turn, and lie down appropriately inside the required container. For cabin travel, the practical test is simple: can your dog remain comfortably inside a fully closed, leak-resistant, ventilated carrier that fits under the seat in front of you? American specifically says the pet must be small enough to fit comfortably inside the closed or zipped carrier, and its recommended soft-sided size is 18 x 11 x 11 inches. Southwest requires the carrier to be leak-proof, well ventilated, and small enough to fit under the seat in front of you; your dog must remain in it at all times in the gate area, during boarding and deplaning, and onboard. For cargo or baggage-compartment travel, crate standards are stricter. CDC guidance says cargo-area animals should travel in a USDA-approved shipping crate large enough for the dog to stand, sit, and turn around comfortably. American’s checked-pet kennel rules also require enough room for the dog to stand, turn, sit, and lie down naturally, with a combined kennel-plus-pet weight limit of 100 pounds for its checked-pet program. Measure your dog from nose to base of tail, floor to top of head or ears, and shoulder width at the widest point before buying anything.

If your dog fits safely in cabin, that is usually the simplest option because you keep visual contact and avoid ramp handling. But cabin travel is not automatically better for every dog. A nervous dog that vocalizes, paws at the zipper, or cannot settle under a seat for several hours may be denied boarding or create a miserable trip. The U.S. Department of Transportation notes that pet policies vary widely and many airlines restrict brachycephalic dogs because of breathing risk. Cargo or baggage-compartment travel can be appropriate for larger dogs when the airline has a climate-controlled program and your dog is crate-trained, healthy, and not a short-nosed breed subject to restrictions. American explicitly bars sedated or tranquilized pets because sedation raises respiratory and cardiovascular risk at altitude. CDC travel guidance also recommends a direct flight when possible, a vet-issued health certificate dated within 10 days of departure, and a USDA-approved shipping crate for animals traveling in the cargo area. If your dog is elderly, medically fragile, heat-sensitive, or highly anxious in confinement, talk with your veterinarian before committing to air travel at all. In some cases, driving or boarding locally is the safer choice than forcing a flight that technically meets airline rules but is a poor fit for the dog.

Pet space is often capped separately from passenger seats, so you should reserve your dog’s spot as soon as your own ticket is issued. Do not assume that buying a ticket online automatically secures pet space. American lets travelers add a carry-on pet through the trip-management flow, but still requires you to stop at the ticket counter so staff can verify the pet and kennel and collect the fee. Southwest requires pet reservations to be made by phone and the pet fare to be paid at the airport ticket counter before you go to security. Alaska instructs travelers to book their own ticket first, then contact reservations to reserve pet space; it also warns that baggage-compartment pets are subject to breed restrictions, embargoes, and fleet limitations. Build extra airport time into your plan. American says checked-pet travelers should allow at least two hours and no more than four hours before departure, and even in-cabin travelers should expect counter processing. If your itinerary includes another airline, especially on a codeshare, verify every segment individually. American states that it does not collect pet fees for other operating airlines, and Alaska says baggage-compartment pets are not transferred to other carriers and must be claimed and rechecked. That single detail can turn a legal itinerary into an impossible one.

Airport day goes better when you treat it like a timed routine. Feed lightly, exercise your dog before leaving for the airport, and plan one last potty break before check-in or before securing the dog in a crate. Alaska specifically recommends a pre-flight workout, extra check-in time, and a potty stop at an airport animal relief area. At TSA screening, never send your dog through the X-ray machine. TSA says you should remove the dog from the carrier, send the empty carrier through X-ray, and either carry the dog or walk the dog through the metal detector on a leash while following officer instructions. After screening, move to the recomposure area before putting your dog back into the carrier. CDC also advises keeping hand-carried pets in carriers under the seat in front of you and never in an overhead bin. If you are traveling with a service dog, DOT says airports and airlines must provide access to service animal relief areas, and the dog must fit in the handler’s floor space without blocking aisles or emergency egress. Pack a small airport kit: leash, backup slip lead, absorbent pads, wipes, a collapsible bowl, a photo of your dog, and printed health paperwork in case your phone dies.

A pet dog, a trained service dog, and an emotional support animal are not treated the same under U.S. air rules. DOT says a service animal for air travel is a dog individually trained to do work or perform tasks for a person with a disability; emotional support animals are not service animals under the Air Carrier Access Act. Airlines may require the U.S. DOT Service Animal Air Transportation Form, and for flights of eight hours or more they may also require the relief attestation form. For ordinary pet dogs, airlines may require vaccination records or health certificates depending on route, destination, or whether the dog is traveling in cargo. CDC guidance recommends a health certificate dated within 10 days of departure for air travel and reminds travelers to research both destination-country rules and U.S. re-entry rules. This matters even more after the CDC dog import changes that began on August 1, 2024. CDC states that all dogs entering the United States must appear healthy, be at least six months old, be microchipped, and have a CDC Dog Import Form receipt, with additional requirements based on where the dog has been in the previous six months and its rabies-vaccination history. If you are flying abroad and returning, build your paperwork plan before you buy the ticket, not the week before departure.