Can Your Pet Fly In-Cabin Internationally? 7 Limitations to Know Before You Book

When most pet parents picture flying with their cat or small dog, they picture the cabin: carrier tucked under the seat, pet close enough to reassure. It is the option people ask about first, and on many short domestic flights it works well.

Internationally, it is also the most restricted way to fly. Whether your pet can travel in-cabin depends on four things lining up at once: your pet's size, the airline, the route and the destination country's import rules. If any one of them says no, the cabin is off the table.

This guide walks through the most common reasons in-cabin travel gets ruled out on international trips, and what your options are when it does. If you are new to the three ways pets fly, start with 3 Types of International Pet Air Travel.

1. Your pet is too big for the carrier (or the carrier is too big for the seat)

Size rules out more pets than anything else. The carrier has to fit fully under the seat in front of you, and your pet has to fit comfortably inside it.

• Carrier dimensions are small. On most Air Canada aircraft, the in-cabin carrier limit is 40 cm wide, 43 cm long and 20 cm high. Some business class cabins on wide-body aircraft allow an even narrower carrier, so the same pet can qualify in economy and not in business.
• Weight caps are common. Many airlines set a combined limit for pet plus carrier, often in the 8 to 10 kg range. Others publish no weight limit but enforce the carrier size strictly.
• Your pet must be able to move. Airlines generally require that your pet can stand up, turn around and lie down inside the carrier, with no part sticking out. Air Canada states a pet can be refused if the carrier is too small for it.
• Carrier type matters. Since June 1, 2025, Air Canada accepts only soft-sided, flexible carriers in the cabin.

In practice, this means in-cabin travel is realistic for cats and small dogs only. Medium and large dogs fly as checked baggage or cargo. Our guide to pet travel crate measurements explains how to size your pet correctly.

2. Your destination requires pets to arrive as cargo

Some countries do not let pets enter in the cabin at all, no matter how small they are. This is a government import rule, not an airline choice, so switching airlines will not change it. These countries require manifest cargo so their veterinary officials can inspect every animal at a dedicated facility on arrival.

• United Kingdom: The UK government states that pets arriving by plane must travel as cargo, with exceptions only for chartered private flights and guide or assistance dogs. Pets must also use an approved route and carrier. See our Canada to UK guide.
• Australia: Australia's Department of Agriculture requires imported cats and dogs to arrive as manifested cargo in an IATA-compliant crate, unless they arrive by private or chartered flight. See our Canada to Australia guide.
• New Zealand: Pets entering New Zealand travel as manifest cargo under strict biosecurity rules. See our Canada to New Zealand guide.

Other destinations, such as South Africa, also require pets to travel as cargo. Always check the import rules for your destination before you book your own ticket. For a deeper look at why cargo is often required, read Pet Cargo Travel: 5 Common Misconceptions.

3. The airline or route does not allow in-cabin pets

Even where a country allows cabin pets, the airline you want may not. Pet policies vary widely between carriers, and some international airlines do not offer in-cabin pet travel at all.

• Some airlines exclude cabin pets entirely. British Airways, for example, carries pets only through its cargo partner, and Air New Zealand accepts only trained service dogs in the cabin.
• Some routes are excluded. An airline may allow cabin pets on most flights but not to certain destinations. Air Canada, for instance, does not accept pets in the cabin on flights to or from Hawaii.
• Codeshares catch people out. The operating airline's rules apply, not the one you booked through. Air Canada states that if a flight is sold under its code but operated by a codeshare partner, you cannot bring your pet on that flight.
• Connections double the rules. An itinerary across two airlines has to satisfy both pet policies, plus any transit rules at the connecting airport.

The safest approach is to confirm pet acceptance with the operating carrier for every leg before paying for your own ticket.

4. The flight has no space left, or your seat does not qualify

Airlines limit how many pets can fly in the cabin on each flight, and spots go first come, first served. Buying your own ticket does not reserve one for your pet.

• Register your pet right away. Air Canada recommends registering your pet within 24 hours of booking, so your ticket can be refunded without charge if your pet cannot be accommodated. Pets not registered in advance are not accepted at the airport.
• One pet per passenger is the usual rule in the cabin.
• Seat restrictions apply. Pets generally cannot sit in exit rows or bulkhead rows, where there is no under-seat storage. Air Canada also excludes its Premium Economy cabin because of the seat layout.
• Check-in takes longer. Passengers with pets usually cannot check in online and must see an agent at the airport, so plan to arrive early.

If you are flying during holidays or peak travel periods, book as early as you can. Cabin pet spots on popular international routes can fill quickly.

5. Your pet's species, age or breed does not fit the rules

• Usually cats and dogs only. Many airlines limit the cabin to cats and small dogs. Rabbits, birds and other pets are often excluded on international flights, even when an airline accepts them domestically.
• Minimum age. Airlines set a minimum age for cabin pets (Air Canada's is generally 10 weeks, fully weaned). The destination's rules often push that higher. The EU, for example, requires a rabies vaccine given at 12 weeks or older, followed by a 21-day wait before entry, so most puppies and kittens cannot travel to Europe until they are about 15 weeks old.
• Snub-nosed breeds. Brachycephalic breeds like Pugs, French Bulldogs and Persian cats face the strictest rules in the hold. Air Canada, for instance, does not accept them in its baggage compartment. For a small snub-nosed pet, the cabin may be the only airline option, which makes the size and route limits above even more important. Our breed-specific travel tips cover this in more detail.
• Health and condition. Airlines can refuse pets that appear unwell or seem too distressed to travel safely.

6. The flight is too long for your pet to be comfortable

In-cabin does not always mean easier on your pet. Cabin pets must stay in their closed carrier under the seat for the entire flight, including taxiing and any delays on the tarmac.

On a long-haul international flight, that can mean 8 to 14 hours or more in a small soft-sided bag, with no space to stretch and no relief area on board. Add connections, security screening (where you will usually need to take your pet out of the carrier) and time at the gate, and the total travel day can be much longer than the flight time.

For some pets, especially anxious ones or those that do not settle in a carrier, a well-ventilated, appropriately sized kennel in the hold can be the more comfortable option. Crate training well ahead of the trip helps either way. See Preparing Your Pet for Air Travel: 5 Tips and Dog Comfort and Safety During Air Travel.

7. Service dogs and emotional support animals follow different rules

Trained service and assistance dogs are the main exception to many of the limits above. Even the UK, which requires pet cats and dogs to arrive as cargo, allows recognised assistance dogs in the cabin on approved routes. These dogs still have to meet the destination's health and documentation requirements, and airlines usually need advance notice.

Emotional support animals are a different matter. The UK government notes that dogs providing only emotional support are not usually treated as assistance dogs. In Canada, the Canadian Transportation Agency decided in 2023 that carriers are only required to accept emotional support dogs, and only under specific conditions. Rules differ between airlines and countries, so an emotional support animal may need to travel under the airline's standard pet policy, with all the size, route and destination limits that come with it.

If you travel with a service or emotional support animal, confirm the requirements with both the airline and your destination country well before you book.

A note on paperwork: in-cabin does not mean less of it

A common assumption is that a pet flying at your feet skips the formalities. It does not. An in-cabin pet must meet the same import requirements as a pet flying in the hold.

Depending on the destination, that can include an ISO microchip, rabies vaccination with a minimum waiting period, parasite treatments, a veterinary export certificate endorsed by the Canadian Food Inspection Agency and, in some cases, an import permit or rabies titre test. The CFIA cannot endorse an export certificate once your pet has left Canada, and government veterinary officials can inspect your pet on arrival.

Timing matters too. Many health certificates must be issued within a short window before departure, so the paperwork needs to line up with your confirmed flight dates. Our guide to why international pet travel is more than just booking a flight explains how these steps fit together.

What to do when in-cabin is not an option

If the cabin is ruled out, your pet can still travel safely. The two main alternatives are:

• Checked baggage (accompanied): Your pet flies in a temperature-controlled, pressurized hold on the same flight as you, in a rigid kennel. It is offered on some airlines and routes, with seasonal temperature limits and breed restrictions.
• Manifest cargo (often called pet cargo): Your pet is booked through the airline's cargo division, with dedicated live-animal handling and acceptance procedures. It is required for some destinations and is the usual route for large dogs, unaccompanied pets and complex itineraries.

To compare the two, read Pet Cargo vs. Checked Baggage: What's the Difference? and Why Does Pet Cargo Cost More Than Checked Baggage? Whichever option you choose, the right kennel is essential: see Pet Travel Crate Measurements.

At Paws en route, much of our work is with pet parents whose plans do not fit the in-cabin rules: larger dogs, cargo-only destinations and routes with tricky connections. We coordinate the airline booking, crate compliance and paperwork so each piece lines up.

Helpful official resources

• CFIA: Taking pets out of Canada
• GOV.UK: Travel routes for pets entering Great Britain
• GOV.UK: Approved air, sea, rail and charter routes for pets
• Australian Department of Agriculture: Cats and dogs on private or chartered flights
• Air Canada: Travelling with your pet
• IATA: Travelling with pets
• Canadian Transportation Agency: Decision on emotional support animals

Need help when in-cabin isn't an option?

Airline policies and import rules shift often, and they rarely line up neatly across a whole itinerary. As an IPATA-certified pet travel company, Paws en route keeps track of those changes for you. We confirm what applies to your specific route, book the right travel option for your pet, check crate compliance and time the paperwork and CFIA endorsement around your flight.

If your pet needs to fly as cargo, request an air travel quote and our team will plan the journey with you. Planning to fly with your pet yourself and only need help with the documentation? Just mention that in your request and we will tailor our support to what you need.

Note: The information in this article is for general guidance only. Requirements can differ by airline, route, aircraft and season, so always confirm the current rules with your airline and your destination country's official authorities before booking travel.