We are actually doing a container so I wouldn't be able to tell you about shipping boxes, but I do know about the excess baggage though. Most airlines have changed their baggage allowance to only 50 pounds per suitcase now, and I know that Virgin Atlantic won't even let you pay for extra weight in a suitcase, they would make you put the extra stuff into another case. You can pay for extra baggage though, and with Virgin Atlantic (up to 50lbs) would be $100 dollars per case. Just FYI.