How to Beat Jet Lag: Before, During & After Your Flight

Q: How long does jet lag usually last?

A common rule of thumb is about one day of recovery per time zone crossed, though it varies by person and direction. Flying east often takes longer to recover from than flying west. Good light exposure, activity and sleep timing can shorten it.

The fastest way to beat jet lag is to help your body clock catch up to the destination as quickly as possible: shift your schedule a little before you leave, live on destination time the moment you board, and use daylight, activity and meal timing once you arrive. There's no magic switch that erases it, but the right routine can shrink a rough few days into a mostly comfortable one. Here's what actually works, in the order you'll use it.

1. What causes jet lag (and why eastward is harder)

Your body runs on a roughly 24-hour internal clock that governs when you feel sleepy, alert and hungry. When you fly across several time zones, that clock is still set to home while the sun, meals and everyone around you are on a new schedule. That mismatch — not the flight itself — is what leaves you wired at 3 a.m. and foggy at noon.

A useful rule of thumb: your body clock naturally drifts a little later each day, so it finds it easier to stay up late than to fall asleep early. That's why flying east is usually harder than flying west. Flying west lengthens your day (you just stay up later), while flying east shortens it and asks you to sleep before your body is ready. Symptoms often last roughly a day per time zone crossed, though this varies a lot by person.

Direction matters: westward "delays" your clock and tends to be gentler; eastward "advances" it and tends to bite harder.
Time zones crossed matters: one or two zones barely register; five or more is where a real plan pays off.
People differ: age, sleep habits and how flexible your schedule is all change how badly it hits.

2. Before your flight: shift gradually

You can pre-adapt by nudging your schedule toward the destination in the days before you leave. The idea is to arrive already partway shifted, so there's less gap to close.

Flying east? Try going to bed and waking up 30–60 minutes earlier each day for a few days, and get bright light in the morning.
Flying west? Do the opposite — stay up and wake a little later, and get light in the evening.
Arrive rested, not wrecked. Sleep debt makes jet lag worse, so don't pull an all-nighter packing the night before.
Sort the boring stuff early so travel day is calm — see our first international trip checklist.

Even one or two days of gradual shifting helps. If your schedule won't allow it, don't worry — the on-board and post-arrival steps do most of the heavy lifting.

3. On board: live on destination time

The single most useful habit is to set your watch (and your mindset) to the destination time zone as soon as you board, then make choices based on what time it is there, not at home.

If it's nighttime at your destination, try to sleep: use an eye mask, earplugs or noise-canceling headphones, recline, and skip the movies.
If it's daytime at your destination, stay awake, keep the window shade up, and save sleep for later.
Hydrate. Cabin air is very dry; drink water regularly and it'll help you feel less wrecked on arrival.
Go easy on alcohol and caffeine. Both disrupt sleep quality and dehydrate you — a nightcap at altitude tends to cost more than it helps.
Move a little. Stretch, walk the aisle when it's safe, and avoid marathon sitting.

A comfortable sleep setup makes the "sleep on destination time" part far easier — see our travel sleep kit guide for what's worth packing.

4. After you land: reset with light, activity and meals

Once you arrive, the goal is to convince your body clock that the new schedule is real. Three levers do most of the work: daylight, movement and when you eat.

Chase (or avoid) daylight. Light is the strongest signal for your body clock. Get outside during the destination's daytime; if you're desperate to sleep at the wrong hour, dim the lights and rest briefly rather than crashing for hours.
Stay active and social. A gentle walk beats lying in a dark room willing yourself to adjust.
Eat on local time. Meals help anchor your clock, so eat breakfast, lunch and dinner roughly when locals do, even if you're not very hungry yet.
Nap with discipline. If you must nap, keep it short (20–30 minutes) and early enough that it won't wreck your night's sleep.
Sleep at destination bedtime. Even if you're only tired-ish, going to bed on local time speeds the reset.

Melatonin and other sleep aids: some travelers use them to help nudge their body clock or fall asleep, but effects, dosing and whether they're appropriate for you depend on your health, other medications and local rules. This isn't medical advice — ask a doctor or pharmacist before using any supplement or sleep aid, and follow the product's guidance.

Jet lag FAQ

How long does jet lag usually last?

A common rule of thumb is about one day of recovery per time zone crossed, though it varies a lot by person and direction of travel. Flying east often takes longer to recover from than flying west. Good light exposure, activity and sleep timing can shorten it.

Why is flying east worse than flying west?

Your body clock naturally drifts a little later each day, so staying up late (which flying west asks of you) is easier than falling asleep early (which flying east requires). Eastward travel "advances" your clock and usually causes rougher, longer-lasting jet lag.

Should I sleep on the plane?

Base it on the destination time, not home time. If it's nighttime where you're heading, try to sleep with an eye mask and earplugs. If it's daytime there, stay awake and save sleep for later so you land already on local time.

Does drinking water really help with jet lag?

Cabin air is very dry and dehydration makes you feel worse, so staying hydrated helps you feel better even though it doesn't reset your body clock on its own. Go easy on alcohol and caffeine, which disrupt sleep and dehydrate you.

Is melatonin safe for jet lag?

Some travelers use melatonin or other sleep aids, but whether it's appropriate, the right dose and local availability depend on your health and where you are. This is general information, not medical advice — ask a doctor or pharmacist before using any supplement or sleep aid.

This guide is general information for travelers and is not medical advice. Jet lag affects everyone differently, and any use of supplements, medication or sleep aids should be discussed with a doctor or pharmacist. Rules on what products are available or permitted vary by country — check official sources for your destination.