i fly a bit for gigs. not an insane amount, but i’ve probably flown twice w/ona guitar since i was 15. i’m almost always flying w/ two guitars in a double gig bag. sometimes w/ a mandolin or lap steel in a separate bag. sometimes an acoustic or a pedal steel. mostly southwest. never had any real issues, sometimes some stress, but basically, don’t ask anyone any questions, act like you’ve done this 10,000 times before, flash a smile if need be, it all seems to work out fine. throw guitar in overhead bin, done. other than it being a huge pita, I’d be more stressed about shipping a guitar for a trip than flying w/ it. i don’t really know anyone who does fly dates w/ a road case. maybe occasionally, but almost always gig bags on the plane. lost baggage, overage charges, etc. however, yes, walking a pedal steel onto a series of international flights and wheeling it around the airport for miles while hungover and jetlagged, or even just carrying two guitars on your back on a hot airport day is not the most fun thing of all time.