If your guitar is worth a lot or has a lot of sentimental value, I would definitely get a hardcase for it when you transport it. I was exactly in the same boat with a Martin D42. After I introduced myself to the CA/FO, I asked if it would be okay if my guitar could ride in the flight deck while I had a seat in the back. Of course I said feel free to play it anytime while its up there ; ) they laughed and said it wouldn't be a problem. Hopefully you'll have as good experiences as I have jumpseating with the crews. Worst case scenario, its in the cargo of the aircraft which is why I recommend a hard case. Fedexing a guitar even with the airline discount can add up.