Put it in your back pack and take it with you
Twice now I've stuffed my PC internals into a carryon and flown from Indiana to Texas. I left behind my case and PSU because they're too heavy and easily replaceableThe first time, I didn't really bother protecting anything and the motherboard didn't surviveThe second time, I learned my lesson and put it into its box, and everything made it okay.So the lesson is, wrap your poo poo and especially the motherboard, don't assume your clothes are enough padding