I would "think" maybe just taking the needle out? Will you be doing it as a carry on? I would be worried about checking it..they throw those suitcases around pretty good. I can't think of anything else that might be considered dangerous but you should be able to go on the site of the air line you will be flying and check the requirements. Of course, scissors, rotary cutters and things like that are probably not allowed except in checked baggage.