Ditto for me, but one additional caution: When you go thru security, they may want you to remove the case from your carry ons. If they want to inspect your flute, allow them to do so, but you may want to offer to show them how to properly open the case. I've heard of TSA agents opening the case upside down and allowing the flute to spill out with disastrous consequences!
"Never give a flute player a screwdriver."
--anonymous--
I've never had any issues whatsoever. I just leave it in my case and gigbag and send it through. One of my teachers however had hers opened and investigated because it was in a Wiseman case... looked like a pipe bomb to them I guess.