I recently tried to carry on a small kennel that was concealed in a pet safe bag and small enough to fit under the seat in front of me. I had called the airline ahead of time to get the fees and the dimensions the kennel needed to be to go under the seat. They told me it was $75 one way to carry a pet on as long as it fit under the seat and kennel was secure. They said I could pay the $75 at the counter when I picked up my boarding pass. When I went to the counter to pay the $75, they asked what was in the kennel. I said "my pet chinchillas". They immediately said "you can only carry on a dog or cat". They couldn't even see what I had in the kennel, but because I was honest and said "pet chinchillas" I could not board with them. This was on a domestic flight. I can almost guarantee your only option of flying with them internationally would be to put them in cargo and most likely they will have to stay in quarantine for awhile after you get there.