You land after a 14-hour flight, it’s 10 a.m. local time, and your body is convinced it’s the middle of the night. You push through the day, crash at 7 p.m., then lie wide awake at 3 a.m. staring at the hotel ceiling. That’s jet lag, and for many long-haul travellers it can steal the first several days of a trip.
The good news: you can’t avoid jet lag entirely on big time-zone jumps, but you can shorten it significantly. This guide explains how to beat jet lag with a practical plan for before, during and after your flight, based on how the body clock actually works.
What Causes Jet Lag?
Your body runs on an internal clock, the circadian rhythm, that controls sleep, hunger, alertness, body temperature and hormone release over roughly 24 hours. It’s synchronised mainly by light. When you cross several time zones quickly, your internal clock is still set to home time while the outside world has moved on.
The UK’s National Health Service notes in its guidance on jet lag that common symptoms include difficulty sleeping, tiredness during the day, trouble concentrating and stomach problems, and that it usually improves within a few days as your body adjusts. Bigger time differences generally mean a longer adjustment.
East vs West: Why Direction Matters
- Flying west (for example Karachi to London or New York) lengthens your day. Most people find this easier, because staying up later is easier than falling asleep earlier.
- Flying east (for example New York to Dubai or Lahore) shortens your day. You need to sleep earlier than your body wants, which is usually harder.
Before the Flight
1. Shift Your Schedule Gradually
For three or four days before departure, move your bedtime and wake time by 30–60 minutes per day toward your destination’s time zone. Going east, go to bed earlier; going west, later. Even a partial shift helps.
2. Arrive Rested
Many people pull an all-nighter packing, thinking they’ll sleep on the plane. Starting a long-haul flight already sleep-deprived usually makes jet lag worse.
3. Choose Flight Times Thoughtfully
Where you have a choice, flights that arrive in the late afternoon or early evening make it easier to stay awake until a normal local bedtime. Overnight flights that arrive in the morning can work well if you manage to sleep on board.
During the Flight
4. Switch to Destination Time Immediately
Set your watch and phone to destination time as soon as you board, and try to eat and sleep according to that clock. If it’s night where you’re going, rest. If it’s daytime, stay awake as much as possible.
5. Sleep Strategically
Bring an eye mask, earplugs or noise-cancelling headphones and a neck pillow. A good seat matters, too. Our guide to choosing the best long-haul seat explains which seats are quietest and most comfortable for sleeping.
6. Hydrate and Go Easy on Alcohol and Caffeine
Cabin air is dry. Drink water regularly. Alcohol may make you drowsy but fragments sleep, and caffeine late in the destination’s day can keep you awake when you need to sleep.
7. Move Around
Walk the aisle every couple of hours and do seated stretches. It helps circulation and can make you feel less wrecked on arrival. More in-flight comfort ideas are in our long-haul flight tips.
After You Land: The Day-by-Day Plan
Day 1: Anchor to Local Time
- Get daylight. Light is the most powerful signal for resetting your body clock. Spend time outdoors, especially in the morning after flying east, and in the late afternoon after flying west.
- Stay awake until a reasonable local bedtime. If you must nap, keep it to 20–30 minutes and before mid-afternoon.
- Eat meals at local times, even if you’re not very hungry.
- Keep evenings dim and avoid bright screens before bed.
Days 2–3: Keep the Rhythm
- Wake at the same local time each morning, even after a poor night
- Get outside in daylight early in the day
- Exercise lightly, such as a walk, swim or gentle workout
- Limit caffeine to the morning
Days 4 and Beyond
Most travellers feel noticeably better within a few days, though large shifts of eight or more hours can take longer. Don’t judge your progress by one bad night; look at the overall trend across several days. Keep consistent wake times and daylight exposure until you feel fully adjusted.
What About Melatonin and Sleep Aids?
Melatonin is a hormone that signals night-time to the body, and some travellers use it to help shift their sleep, particularly after eastward flights. Rules on its availability differ by country, and it isn’t suitable for everyone. Prescription sleep medicines carry their own risks, especially on flights. Speak to a doctor or pharmacist before using any sleep aid, particularly if you take other medication or have health conditions.
Jet Lag Myths to Ignore
- “Just power through with coffee.” Caffeine can mask tiredness but disrupts the night’s sleep that actually resets you.
- “A long nap on arrival helps.” Long daytime naps anchor you to your home time zone.
- “Alcohol helps you sleep on the plane.” It reduces sleep quality and adds dehydration.
- “Jet lag only affects people who fly often.” Anyone crossing several time zones can be affected.
Travelling With Children
Children often adjust to new time zones faster than adults, but the first couple of nights can be bumpy. Keep bedtime routines familiar, with the same story, pyjamas and comfort items as at home, and get them outdoors in daylight during the day. Plan a quieter first day rather than a packed itinerary, keep naps short and early, and pack snacks for unexpected night-time hunger. Patience helps: a little night waking in the first few days is normal and usually settles quickly.
Special Tips for Short Trips
If you’re only staying two or three days, it may make more sense to stay partially on home time, scheduling important meetings during your natural alert hours, rather than fully adjusting and then readjusting on return.
Frequently Asked Questions
How long does jet lag last?
It varies by person and by how many time zones you cross. A common estimate is roughly a day for each time zone crossed, though good light and sleep habits can speed things up.
Is jet lag worse flying east or west?
For most people, eastward travel is harder because it requires falling asleep earlier than the body wants.
Does business class reduce jet lag?
Better sleep on board helps you arrive more rested, which can make adjustment easier. It doesn’t change your body clock, though. See our comparison of premium economy vs business class.
Should I sleep on the plane if it’s daytime at my destination?
Try to stay awake, or limit yourself to short naps, so you’re tired at the destination’s bedtime.
The Bottom Line
Jet lag happens because your body clock can’t instantly match a new time zone, but you can help it adjust faster. Shift your schedule before you fly, switch to destination time on board, use daylight and consistent wake times after landing, and avoid long naps and late caffeine. With a plan, the first days of your trip can be for enjoying the destination, not counting the hours until bedtime.
