It’s fraught with danger I tells ya! DANGER!
Seriously though, so far, so good. Everything of mine in my army is loaded inside a Citadel Crusade Case (so 2000 odd points of Marines + a bunch of Aeronautica Imperialis), and it’s made the journey without much issue.
Including when I dropped the case. Nothing moved, nothing broken.
It’s a perfect size for carry on luggage (because nobody in their right mind should ever check a case full of miniatures), and fits in the overhead lockers without concern.
Now to just wait until getting to Warhammer World next Friday. Woohoo!