That's why I have travel instruments. Either small size (Baby Taylor, Hofner traveler, Wechter Travel guitar) or something less expensive that I can live with if an accident happens (Takamine instead of Taylor, almost any solid body instead of Alembic). Trying to bring a full-sized instrument on board puts you at the complete mercy of the gate agent. They have a fight with their spouse that morning and you're the one who gets screwed. Given the hassles involved in flying these days, I try to drive whenever I can. My wife & I traveled almost 2000 miles from S.F. to Austin, Texas last summer. We rented a Ford Escape (little SUV), loaded all kinds of stuff in the back, including acoustic and electric guitars, and had a great time!
Bill, tgo