I looked into it a little last summer when it was very new. You buy the ticket thru the airline your intercontinental ticket is on, so your case is AF. There might be info on their website.

Here's a link for info from NW, though you can't ticket thru them. I assume the info is the same though.

http://www.nwaworldvacations.com/spe...erCode=5740WVC

Let me know how it goes....we didn't use it since it didn't include Croatia.