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Traveling with a dog is a logistics problem with a heartbeat. The dog does not care about your itinerary; the dog cares about comfort, routine and staying near you. This hub compares the main ways dogs travel, the documents and safety basics that apply to all of them, and links to our detailed flying guides and per-airline policy pages.
The default for most trips, and the kindest for most dogs. You control departure times, toilet and water stops every few hours, and the temperature inside the vehicle. Use a secured crate or a crash tested harness, plan stops into the route rather than hoping for them, and never leave a dog alone in a parked car in warm weather: cabin temperatures rise dangerously fast even with windows cracked.
Small dogs can fly with you, in a carrier under the seat, on most US airlines, for a per direction fee. Space per flight is limited and sold first come, first served, so the pet is booked early, not added at the gate. Our flying with a dog guide explains how cabin travel works and how to prepare, and our airline policy index compares the major US airlines side by side.
Larger dogs travel in a hard crate in a pressurized, temperature controlled section of the hold, or are shipped as cargo on a separate booking. Fewer airlines offer this than used to, several restrict it to military and government relocations, and all apply breed restrictions, typically excluding short-nosed breeds, plus temperature embargoes in hot and cold weather. Each of our airline pages states whether a hold option exists at all.
Train and ferry rules vary widely by operator and country and change often; some networks welcome small dogs in carriers, others ban pets outside of service animals. Check the operator's own current rules before you build a trip around them, exactly as you would with an airline.
Flying is where the rules are tightest and the differences between airlines are biggest. Read the flying guide first, then the page for your airline: Delta, American, Southwest, Alaska, JetBlue, Frontier and Spirit.
For most dogs and most trips, driving is the easiest: you control the stops, the temperature and the schedule, and your dog stays with you the whole way. Flying suits small dogs who fit in a cabin carrier, or unavoidable long distances. The right answer depends on the dog's size, health and temperament, and the length of the trip.
On most US airlines, yes, if your dog is small enough to fit comfortably in a carrier that fits under the seat in front of you, and you book the pet space in advance and pay the airline's pet fee. Each airline sets its own carrier size, fee and rules, which is why we publish a page per airline.
Within the US, requirements vary by state and airline: a rabies vaccination certificate is the most commonly requested document, and some states require a health certificate. International travel adds destination health certificates, vaccination rules and sometimes quarantine. Our flying guide covers the document picture, and the USDA APHIS pet travel pages are the official reference.
It can be. New sounds, pressure changes, confinement and separation all add up, which is why airlines and veterinarians advise against sedating pets: sedation at altitude is unpredictable. A dog who is healthy, crate trained and used to its carrier usually copes far better than a dog meeting the carrier on travel day.
Options shrink fast. A few airlines still carry larger dogs in the baggage compartment or as cargo, many no longer do, and each has breed and temperature restrictions. Our airline pages state plainly which airlines still offer a hold option and which are cabin only.
Sometimes, yes. For a very old, very young, unwell or highly anxious dog, a trusted sitter or boarder can be kinder than a flight. There is no rule that a good owner always brings the dog; the decision belongs to the dog's welfare, not the itinerary.
Last updated: November 2026. How we work: our methodology.
Every fee, size limit and rule on this page was read on the airline's own published pet policy page in November 2026. Airlines change pet fees and rules without much notice, and the exact aircraft on your route can change what fits. Treat this page as a planning guide and confirm the details on the airline's own page, and again when you add your pet to the booking, before you rely on them.