Guitar, in-case. Case has a solid frame with padded/soft Exterior & Interior (only possibility to damage the instrument would be from intention) Because of the soft exterior, it's also a lot more comfortable to handle.
Case also includes normal guitar accessories.
I've already traveled with it…
There's a US law which requires airlines to allow instruments as carry-on items. (If there are any international fees, or if you have to pay for an extra carry-on, I can pay for beforehand if possible, or you can send me photos of the receipts for me to add to your tip.
Most large airplanes have a 'coat closet' where instruments fit and can be stored during the trip.
The flight attendants have always been super-helpful, so just ask them. Sometimes they'll allow it in a spare seat or behind the last seat. Just ask.
(In a rare occasion, there was a small aircraft and full, so flight attendants required me to 'gate-check'.)
Item size : Large
What type of item : Personal item
Item value :
Reward : If you prefer, I could apply credit cards miles to your flight to offset your trip cost. Or play some medicine music or mantra music (not so good at singing yet;)