Sleeping on a plane sounds simple in theory: you sit, you close your eyes, and boom, nap time. In reality, between cramped seats, engine noise, turbulence, and the guy next to you ordering a third ...

Add Yahoo as a preferred source to see more of our stories on Google. Whether it’s a red-eye flight across the country or a long-haul journey overseas, trying to sleep on a plane can be a nightmare.

Flying can be fun. Not so fun? Feeling exhausted upon reaching your destination because you weren’t able to get any shut-eye on the plane. Or perhaps worse: starting your trip super groggy because you ...