I flew to New Zealand with a BOB and it was really easy. I didn't buy the waterproof bag, I used my backpack in place of it. When it was time to get on the plane, the tire and gooseneck (for lack of a better term) went in the bike box, and the backpack stayed bungeed in the trailer as checked luggage. I used American, United, and Quantas in my travels this way and they were all fine with this setup. I also went on Greyhound and both NZ bus companies with no problems.