@matt: Last time I flew I figured out how to download quick looks from the site. On top of that I have a 64GB ipad I loaded up with whole seasons of shows including Band of Brothers, Doctor Who, BSG and Leverage.
On top of that I recently invested in a DS and a Vita for different reasons. I recommend a healthy mix of movies, reading, audio stuff, games and sleeping. Then again, I'm the kind who only gets one day off a week so I've mastered not leaving the house. The same principle applies to being stuck on a plane.