I can second Calton Cases. I have two, one for Woody, my custom Further, and one for my Martin. Just about the same size as a standard wood case. I've flown with both with no worries. A big advantage over standard Anvil type cases is that a Calton is small enough that they've let me carry it on the airplane on several occasions, but if they don't, it's as strong or stronger than an Anvil so it can ride in baggage without risking your instrument. Not cheap. but worth it.
Bill, tgo