Rebelfly'
Sorry, I wasn't as specific as I could/should have been.....................
When I answered your question, at first, I ASSUMED, (my mistake, perhaps), that you'd be taking along a rod(s), like 9' 2-piece, and CHECKING THEM. I should have asked, if you're taking 3-4-piece rods, which is usually a "carry on board-store overhead" situation.
"IF" you do check them, "AND" they're 9'-2 piece rods, I'll still suggest the PVC tubes. Also, I forgot to mention something that again I've learned the hard way over the years of traveling with fly gear...................... put your name, address, phone number, dog's name, dog's picture, any identifying info you can think of................. INSIDE your gear, as well as, tagged on the outside.
I almost lost 2 Billy Pates, going to Belize, because the OUTSIDE tag got "mysteriously" ripped off, my travel reel case. Having my ID, inside, when I went to "lost baggage claim", saved my reels.
Saint Paul-"The Highly Confused"
You cannot do a kindness too soon, for you never know how soon it will be too late.
-- Ralph Waldo Emerson