Originally Posted by
Randomness
There can be significant importation paperwork involved in taking an animal to another country from the United States. It very much depends on the country.
Also: "Pets taken out of the United States are subject upon return, to the same regulations as those entering for the first time."
(
https://www.bringfido.com/travel/international/)
I usually fly internationally and have seen few animals on flights.
Yup - I'm always very surprised to see animals on international flights, but I do see them. Last I remember was on a flight to Costa Rica.