When you meditate you also get rest. May take effort to not go with the mind, but you got the traveling time to master it.
I've managed to to make long journeys more positive like that, also because when falling asleep my posture might change giving the body pains after, although you might just fall asleep this way.
So sit straight or some resting posture that business class gives, and watch you breathing ( vipassana is on of the ways) 
Take a style that you feel works. I can send you one if you wish.
What better place to do this, than a place where you're forced to have to stay for a while 🧘 😊 
Good luck