Send me your address and I will mail you a Yazoo Mills shipping tube that even luggage gorillas can't crush. Check it as baggage and don't worry about it in the cabin, they might prevent you from bringing even the shorty on board anyway.
What I recently did was pack the Atlantis in said shipping tube inside a rectangular long box of the same length. This box had paddles, stripping basket, raingear, boots, all kinds of stuff alongside the rod tube inside it. Not even the outer box was harmed, the inner tubes and rods were totally fine.
Hope that helps.