As I look forward to touring in Europe with Elizabeth Shepherd later this month, I also have to plan for a few discount airlines where I'm doubtful of geting my guitar on board in its gig bag the way I do in Canada with Air Canada (I hear lots of complaints about Air Canada, but they have my loyalty over Westjet here simply because their website says that guitars in soft cases are allowed as long as they fit in the overhead, and since then I've had no issues other than once or twice having to direct the staff to their own website. WestJet on the other hand made me gate check it, actually coming and taking it out of the overhead above my seat where it was happily surrounded by purses and backpacks because it was a full flight and someone boarding later than me's suitcase couldn't get on the plane. Hmmm, suitcase vs guitar....). For the record, I've yet to fly a plane, even the tiny one I took to Nashville, where I couldn't fit my guitar in the overhead (another reason I'm a solid body guitar guy).
Last year I bought a new Godin guitar for the express purpose of unscrewing its neck (inspired by my friend Marc van Vugt). Grant at the Twelfth Fret in Toronto shaved the inside of the very snug neck joint just to make it a little easier to take out, but basically I put a capo on at the 2nd fret (so that I don't have to change the strings), unscrewed the neck (buying a very small screwdriver that is allowed in carry on luggage), wrapped it to the body with bubble wrap, and stuffed it in a small backpack surrounded by sweaters. It worked out very well, as security didn't seem to mind (without the strings maybe the neck would be seen as a weapon on its own, but since it was all wrapped together and attached by strings it didn't raise any issues) and it was great to walk on like anybody else. The guitar always played great, but it did mean putting it delicately under a seat instead of the overhead as there's little protection. Indeed, I did get a few minor dings in the neck over the course of a few flights so I'm re-examining the backpack and looking for some other light material to put around the neck. But the trade off of course is having to assemble the guitar and hoping the action and intonation are the same. I also have to sacrifice some packing space to bring a thin gig bag along and I don't get to play the Ernie Ball Reflex that I normally use, unless I decide to take its neck off.