Staying awake on a night flight requires managing your circadian rhythm and physical environment. First, hydrate aggressively; drinking water forces you to stay alert and move around for bathroom breaks. Avoid alcohol and heavy, carb-rich meals, which induce "food comas." Use blue light from your devices or the overhead reading light to suppress melatonin production. Engaging your brain with interactive content—like strategy games or a gripping thriller—is more effective than watching a passive movie. If possible, set your watch to your destination's time zone as soon as you board and stay awake until it is night-time at your arrival city to help combat future jet lag.