Originally Posted by Red Chrome
I prefer these for air travel. The door latches up and down as well as across it. I find them to be the sturdiest. It is what Judge's breeder uses to ship GSDs internationally.
Pretty sure that's the same as the one I posted, it's the older model. They changed their design somewhat. If you can find the older design, great, but they don't sell them new anymore.
The other thing I'd use when flying is hand-releasable zip ties:
They have them there, or you can just buy them in a hardware store. Use them to secure the door, and they can easily be removed when you get there.