I LOVE my Leach Voyage-Air OM size Guitar. Neck folds down, and the backpack size case fits in aircraft overhead bins. Magnificent full sound and superb caraftsmanship throughout.
I'm now using it every time I have to fly.
For many years as some 'Catters know, I recommended Calton cases for flying. Just check the guitar and go; another great piece of workmanship and value. The case got dinged up a bit but the guitar was never damaged.
But after having airlines misplace the guitar (sometimes for up to 4 or 5 days) I became reluctant to check my guitar into the hold.

So our own Deb Cowan told me of her Leach Voyage-Air guitar, and I got one.
Can't recommend it highly enough for traveling....and just playing.