Is jet lag worse flying east or west?

For most people eastward travel is harder, because you have to fall asleep earlier than your body wants, which is tougher than staying up later. Westward trips, where you extend your day, tend to feel easier to adjust to.

Does light really help with jet lag?

Yes. Light is the strongest signal for your body clock. Getting bright light at the right local time — and avoiding it at the wrong time — is the single most effective way to shift your rhythm toward the new time zone.

Should I nap when I arrive?

A short nap of around 20–30 minutes can relieve fatigue without wrecking your night's sleep, but long afternoon naps make it harder to sleep at the local bedtime and prolong jet lag. Prioritise adapting to local sleep times.

Jet Lag: How to Beat It Fast

Q: How long does jet lag last?

A common rough guide is that the body adjusts by about one time zone per day, so a six-hour shift might take several days to settle. Good light timing and sleep habits can speed this up, while ignoring the local clock slows it down.

Reviewed by the ScanFlyGo team · Last updated: July 2026. This is general wellbeing guidance, not medical advice — consult a professional for personal concerns.

Quick answer

To beat jet lag fast, shift toward your destination's schedule before you leave, use daylight strategically on arrival to reset your body clock, stay hydrated, and adopt local meal and sleep times immediately. Get bright light in the morning after flying east and in the evening after flying west, and keep naps short so you can sleep at the local bedtime.

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What jet lag actually is

Jet lag happens when your internal body clock, tuned to your home time zone, is out of step with the local clock at your destination. Until it catches up you feel tired at the wrong times, struggle to sleep, and may notice poor concentration, appetite changes and low mood. The larger the time difference and the faster you cross it, the stronger the effect.

Before you fly

Shift gradually — for a few days beforehand, move your bedtime and meals an hour or so toward the destination time.
Pick arrival wisely — a daytime arrival lets you use daylight to stay awake and reset sooner.
Start well-rested — arriving already sleep-deprived makes jet lag hit harder.
Set your watch — switch devices to destination time as you board to start thinking in the new schedule.

Use light to reset your clock

Light is the most powerful lever you have. The trick is timing it to your direction of travel.

Direction	Seek light	Avoid light
Flying east	Morning at destination	Late evening
Flying west	Afternoon and evening	Very early morning

Getting outdoors for natural daylight at the right local time nudges your rhythm in the direction you need. Bright indoor light and screens at the wrong time can push it the wrong way, so dim things down when you are trying to wind toward sleep.

On the plane

Hydrate steadily and go easy on alcohol and heavy caffeine late in the flight, since both disrupt sleep quality. If it is night at your destination, try to rest with an eye mask and earplugs; if it is daytime there, stay awake. Move around periodically for circulation and comfort, and eat lightly.

After you arrive

Adopt local time immediately. Eat meals at local mealtimes, get outside in daylight, and stay up until a reasonable local bedtime even if you are tired. If you must nap, keep it to roughly 20–30 minutes early in the afternoon so it does not steal from your night's sleep. Consistency over the first two or three days does most of the work.

Frequently asked questions

How long does jet lag last?

A common guide is about one time zone per day, so a six-hour shift may take several days. Good light and sleep timing speed recovery.

Is it worse flying east or west?

Eastward is usually harder because you must sleep earlier than your body wants. Westward travel, extending your day, tends to feel easier.

Does light really help?

Yes — light is the strongest cue for your body clock. Timing bright light correctly, and avoiding it at the wrong time, is the most effective reset.

Should I nap on arrival?

A short 20–30 minute nap can ease fatigue, but long afternoon naps make the local bedtime harder and prolong jet lag. Prioritise local sleep times.

The bottom line

Beating jet lag is about resetting your body clock deliberately: prepare before you leave, use daylight at the right time, stay hydrated, and lock onto local time the moment you land. Choosing a flight with a helpful arrival time makes a real difference — compare options on ScanFlyGo, check the popular routes for schedules, and track your flight live so you can plan your first day with confidence.

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