Get your personalized pre-flight sleep plan — optimal bedtime, day-of strategy, and in-flight sleep tips based on your departure time and destination.
Sleep before a flight is one of the most impactful jet lag interventions available — yet most travelers neglect it. Arriving at the airport sleep-deprived means your circadian system is already compromised before the time zone disruption even begins. Starting with a full night of sleep gives your biological clock a stable baseline to work from during the reset process.
Eastward travel is consistently harder than westward because it requires advancing the circadian clock — going to bed and waking earlier than your biology wants. The human circadian clock has a natural period slightly longer than 24 hours, making it easier to delay (westward, staying up later) than to advance (eastward, going to bed earlier). For eastward travel across 5+ time zones, beginning to shift your bedtime 2–3 days before departure significantly reduces jet lag.
Whether to sleep on a flight depends on your destination's local time when you arrive. If arriving in the evening: sleep on the plane to maximize alertness on arrival. If arriving in the morning: limit sleep on the plane to stay awake until a reasonable local bedtime. The goal is to be able to fall asleep at your destination's night, not to maximize in-flight rest.