Air travel with bikes can be a confusing, frustrating business. Be prepared for clerks who disagree on what is acceptable and what the charges are. Print information you obtained from official websites and stick to your guns. If travelling with friends, be prepared for some connecting flights not having enough room for all bikes to arrive at the same time. Recently I was part of a group of 8 who toured Cape Breton, Nova Scotia. Five arrived in Sydney on the same flight but not one of the bikes had arrived with them. Leave a day or two for bikes to catch up and/or to fix broken or lost parts. Be sure everything is attached to something - don't have loose pedals, seats, etc. floating around in the box or bag. Recently I had a box arrive with the bottom flap completely ripped open. Label the box with your address and cell phone number.