Haha that would be sooo brutal..
I've brought my electric guitar in a gig-bag (pretty much the least pretection possible), but with the guitar wrapped in buble wrap within the case, with out paying extra, and carrying another carry on bag, on air canada twice, once from japan to canda, and once from toronto to kelowna, BC. I pretty much just give the people at the gate the impression that i have no backup plan and they pretty much need to let me bring my guitar or i'll be severely screwed. And i just line up at the gate ASAP and try to get on with like people who need extra help (kids flying alone, some seniors, wheelchair people ect.) pretty much saying that my special need is my guitar. Then they put it like the coat closet/room thing and its just chills there nicely resting against a wall without taking any beatings.
If you have a hardcase it would much much likely to get less denied if you just put it as checked luggage but, serisously...... they beat the shiiiit out of your guitar. I love my accoustic guitar (which i actually have a hard case for) to put it in chekced luggage. I dont have a hard case for my electric yet because the body is like a semi-elongated flying v making it need a custom molded bass case ( the gig-bag that came with it is a bass one).
but that costs more money i think^
Its pretty bad musicians got soooo shafted from airlines, people used to be able to reserve the seat beside them without charge to put there instruments on ie a chello player. If you like your instrument alot and your not moving,, and its just a vacation, then i think the risk of it getting destroyed is not worth the fun you will have jamming with it. (i only flew with my electric because i bought it in a different country, and then i moved for school (university), and i would be without it for 8 months.