Originally Posted by
yonajon
I'm hoping to fly on the 787 for both legs of my journey, so hopefully there'll be a closet.
The 787 will have no shortage of space for your guitar. There's one huge closet in First and up to 3 more (depending on which configuration) coat closets up front. There are also two closets in the back of Y that are meant for FA belongings & onboard supplies, but I've used them for band instrument storage before. Just ask the greeting FA as you step onboard.
Most FAs are rather caring with instruments. Most (all?)
mainline overhead bins will fit a standard hard case (though not a case + a roller bag) so it'd be best to get onboard early.
All of this, however, is during normal times. I can't/won't guess how your particular crew will decide to handle guitars and moving them to a closet. Things are weird right now, and that certainly extends to crew.