Originally Posted by
patentcad
They don't charge extra on international flights. I haven't paid extra, and I've been to Europe 3x over the last four years. They run it through as a regular bag on Continental, SAS, Olympic, etc. The surcharges for those bike bags are on domestic flights in the US.
It depends on the airline ... and how nice you are to the check-in person.
http://www.ibike.org/encouragement/travel/bagregs.htm