In a story that I am working on, international Floo tavel is used a great deal for travel, but I am still trying to work out a lot of the finer details of how it would work. I almost imagine a special level in the Ministry of Magic connecting to Ministry all over the world. Once in another country, a local Floo channel can be used to travel. Though because you have to keep transfering and moving to different fireplaces, internation travel by Floo as a whole is extremely complicated and time consuming (not so different from out own airport, huh?).
What are you opinions on how international Floo travel works?