The following information has been collected from the airlines’ published pet policies, supplemented (in some cases) by telephone inquiries. It was last updated on April 14, 2020.

For each airline, I have provided a link to the airline’s pet policy. Please note that the policies include details that I can’t fit into this chart. For example, some countries do not allow pets to arrive in-cabin (including the U.K., South Africa and Australia). Because of airplane cabin configurations, in-cabin pets won’t fit at all under some sections’ seats. Information like this varies by airline, so read the policies carefully. If you still have questions, call your airline’s contact number and get answers before you arrive at the airport.

It is also a good idea to print out a copy of your airline’s policy, so that if a dispute arises with a ticketing or gate agent, you will have the actual policy to refer to (not the agent’s potentially faulty memory of the policy).

Notes:

1. “Several animals of one type can be transported in one container (except for when the quantity of animals permitted for transportation by one passenger is limited by the legislation of the country of origin, destination or transit). The container should be sufficiently large to allow the animal to stand up, turn 360 degrees, and lie down in a natural position, and the weight of animals together with the container shall not exceed 8 kg.” (Aeroflot)
2. “Each passenger can bring 1 pet in 1 cage into the cabin (or 2 puppies or 2 kittens under the age of 6 months – If a mother bird and her baby are a pair, they may also be brought together)” (Asiana)
3. “2 pets of the same breed and size between the age of 10 weeks and 6 months may be allowed to travel in 1 kennel, providing they are small enough to fit into one kennel and are compatible. They will be charged as 1 pet,” and “One female cat/dog may travel with her un-weaned litter if the litter is a minimum of 10 weeks old to 6 months of age.” (Delta)
4. “You can carry several animals of the same species in the same container if they are small and light enough.” (Iberia)
5. Two pets in in-cabin carrier okay if “they are the same breed and under 6 months of age” (Korean Air)
6. “Only one transport container per passenger is allowed in the cabin. The number of animals per transport container is limited to one animal. However, exceptions apply: two young animals of comparable size and a minimum age of 12 weeks or two fully grown animals of comparable size or a mother animal with one young animal (0–6 weeks) still dependent on the mother are permitted in the same transport container. The requirement for transporting several animals in the same container is that all the animals in the container must be able to stand, lie down and turn in their natural positions, the animals are used to being together and the maximum total weight of all the animals including transport container does not exceed 8 kg.” (Lufthansa)
7. “Each passenger may carry one flexible animal transport bag/carry case, which may contain more than one animal of the same species.” (TAP Portugal)
8. “Only animals of the same species and that are used to being together can be transported in the same cage. It is possible to carry two birds, two cats or two dogs familiar with each other in the same cage provided that our maximum weight limit of 8 kg is not exceeded.” (Turkish Airlines)