I've got a small guitar with a bolt on the neck that can be detached for travelling. It fits in the stabndfard aeroplane cabin case. Of course, it's a drag having to loosen all the strings and tune up from slack, but the strings don't seem to mind.

But it takes a little time for the body to settle back into sounding right again, it has to be played in, as Foolestroupe said there. Doesn't take that long though.