If anyone knows how to travel with a bike, it’s Mr. Prolly. He recently compiled a pretty informative post on his tried and true method of flying with a bicycle and I gotta agree with him here: the cardboard box is your friend. While I think the Chinatown suitcase method is a close runner up, you can’t beat a nearly free (just make sure to buy your local shop some beer) cardboard box and some packing tape. It’ll break down for easy storage wherever you’re staying, and most towns will also have a shop where you can probably find another if need be. The comments section here is also great and filled with some valuable insights. John probably has the best method, still.