My bass has flown with me al over the world.. I bought it in California, then to Mexico, Argentina, Back to Mexico, then to Canada, back to California, then to Asia where I currently live.. And no, I am not touring.. (I wish..!) just bounced around a lot for the last 3 years.
Any way, the point is I travel with my bass on its hard case.. sometimes they let me take it in the cabin, other times I have to gate check it (I never just throw it down with the bags.. it stays with me for as long as I can) never had a problem.
I have never taken it apart.. It is a bit hard to lug it around airports and so, but there are pushcarts in many airports, so its not that bad..
Also, most countries will allow you to get in one music instrument for your personal use without having to pay import taxes or duties..
Espero esto te sea util!