How To Beat Jet Lag: Practical, Evidence-Based Ways To Recover Faster After A Long Flight

Jet lag is an unfortunate reality of long-haul travel. If you’ve ever stepped off a plane feeling exhausted in the middle of the day, found yourself wide awake at 3am or wondered why your stomach seems convinced breakfast should be served at midnight, you’ve experienced just how disruptive it can be. Crossing multiple time zones throws your body’s internal clock out of sync, and while it isn’t dangerous or serious for most healthy travellers, it can certainly make the first few days of a trip feel far less enjoyable than they should.

The good news is that jet lag doesn’t have to ruin the start of your adventure. You can’t eliminate it completely, especially after crossing several time zones, but you can reduce its impact and help your body adapt much more quickly. A little preparation before you travel, a few sensible decisions during your flight and the right approach once you arrive can make a remarkable difference to how quickly you feel like yourself again.

And no, it doesn’t involve scrunching your bare feet on a carpet and running around a building full of terrorists in your vest.

I’ve been travelling for decades, and during that time I’ve crossed more time zones than I care to remember. Combined with my professional background in travel health, I’ve learned that there are no miracle cures for jet lag, despite what countless supplements, gadgets and internet myths might claim. There are, however, a number of simple, evidence-based strategies that genuinely help your body adjust more quickly. This guide brings together current medical understanding with years of practical travel experience to help you recover faster, feel better sooner and start enjoying your trip from day one.

So How can you beat jet lag? Quick Answer

Jet lag can’t always be avoided, but you can reduce its impact. Start adjusting to your destination’s time zone before you travel, stay hydrated, sleep strategically during your flight, get outside in natural daylight when you arrive, eat and sleep according to local time and resist the temptation to spend your first few days rushing from one attraction to the next. Most people recover within a few days, and the more you help your body adapt to the new time zone, the sooner you’ll feel back to normal.

What Is Jet Lag?

Jet lag is a temporary disruption to your body’s internal clock that happens after travelling rapidly across multiple time zones, usually on a long-haul flight. Your body is still operating on the time at home, while the world around you is following a completely different schedule. Until those two clocks catch up with each other, you can find yourself feeling tired when you should be awake, wide awake when you should be asleep and generally out of sync for a few days.

For most people, jet lag isn’t serious and will resolve naturally as the body adjusts to its new time zone. However, it can leave you feeling surprisingly miserable, affecting your sleep, energy levels, concentration, mood and even your appetite or digestion. The more time zones you cross, the more noticeable the symptoms are likely to be.

It’s also worth knowing that jet lag isn’t quite the same as travel fatigue. A long journey can leave anyone feeling tired simply because of poor sleep, long hours sitting down and the general stresses of travelling. Jet lag is specifically caused by crossing time zones and disrupting your body’s natural daily rhythm.

Why Do You Get Jet Lag?

If you’ve ever landed somewhere on the other side of the world feeling wide awake at three o’clock in the morning or desperate to sleep in the middle of the afternoon, you’ve experienced the effects of your body’s internal clock falling out of sync with the world around you.

The important thing to understand is that jet lag isn’t caused by flying. It’s caused by travelling across multiple time zones faster than your body can adapt.

Every one of us has an internal body clock, known as our circadian rhythm. This is a roughly 24-hour cycle that regulates almost every aspect of our daily physiology. It influences not only when we feel sleepy or alert, but also our body temperature, hormone production, appetite, digestion, concentration, physical performance and countless other biological processes that follow a predictable rhythm throughout the day.

Under normal circumstances, your circadian rhythm stays remarkably well synchronised because it’s constantly being reset by the environment around you. The single most important cue is natural daylight. Light entering your eyes each morning tells your brain that it’s time to wake up, suppresses the production of melatonin and helps keep your body clock aligned with the day-night cycle. As evening approaches and light levels fall, melatonin production gradually increases again, preparing your body for sleep. Meal times, physical activity and your daily routine also help reinforce that rhythm, but none of them has as much influence as light.

The problem is that your body clock can’t keep up with modern air travel.

You can leave London in the evening and arrive in Singapore the following afternoon, or board a flight in New York and land in Paris the next morning, but your brain has no way of making that adjustment instantly. As far as your body is concerned, it’s still operating on the time back home. Until your circadian rhythm gradually catches up, your internal clock and the local time are working against each other.

That mismatch is what causes jet lag.

Your watch might tell you it’s time for breakfast, while your body insists it’s the middle of the night. You may feel hungry at odd hours, struggle to stay awake during the day or find yourself staring at the ceiling long after everyone else has gone to sleep. These aren’t signs that something is wrong with you; they’re exactly what you’d expect when your internal clock is still living in a different time zone.

Fortunately, your body is remarkably adaptable. It begins adjusting almost as soon as you arrive, but it does so gradually rather than all at once. A commonly quoted rule of thumb is that most people adjust by around one time zone per day. That’s only a rough guide, as the speed of adaptation varies between individuals and depends on factors such as age, sleep habits, the number of time zones crossed and the direction of travel, but it helps explain why recovering from jet lag usually takes days rather than hours.

Why Travelling East Usually Feels Harder

If travelling east always seems more difficult than flying west, you’re not imagining it.

If you’ve ever thought that flying to Asia or Australia feels harder than coming home again, you’re certainly not imagining it.

For most people, travelling east is more challenging because it requires the body clock to move forwards. In practical terms, that means trying to fall asleep earlier than your body naturally wants to. Travelling west has the opposite effect, effectively lengthening the day by asking you to stay awake a little later instead.

Humans generally cope better with a slightly longer day than a shorter one. In fact, our natural circadian rhythm is usually a little longer than 24 hours, which makes delaying sleep easier than advancing it. That’s why eastbound travel often produces more severe jet lag and takes a little longer to recover from than an equivalent journey heading west.

Flying Itself Doesn’t Cause Jet Lag, But It Can Make You Feel Worse

Although the two are often confused, jet lag and travel fatigue aren’t the same thing.

Jet lag is the disruption to your body clock caused by crossing time zones. Travel fatigue is the physical and mental exhaustion that comes from the journey itself.

Long-haul flights are tiring, even if you never leave your own time zone. Hours of sitting in a cramped seat, interrupted sleep, dry cabin air, unfamiliar meal times and the general stress of travelling all leave most people feeling drained before they even arrive. None of those things actually causes jet lag, but they do make it much harder to feel at your best while your body clock is trying to adjust.

That’s why it’s perfectly possible to feel exhausted after a long flight without having jet lag at all, and why someone crossing ten time zones can feel even worse because they’re dealing with both travel fatigue and jet lag at the same time.

It also explains why otherwise perfectly sensible adults suddenly convince themselves that standing in the aisle while the aircraft is still taxiing to the gate is somehow going to get them off any quicker. Lack of sleep and long journeys have a curious effect on human behaviour.

Common Symptoms Of Jet Lag

Jet lag affects far more than your sleep.

Because your circadian rhythm helps regulate so many different processes throughout the body, disrupting it can leave you feeling physically, mentally and even emotionally out of sync. Exactly how much you’re affected varies from person to person. Some travellers notice little more than a few restless nights, while others feel as though their whole routine has been turned upside down for several days.

The number of time zones you’ve crossed, the direction you’ve travelled, your age, your normal sleep patterns and even whether you’re naturally an early bird or a night owl can all influence how noticeable your symptoms are. Fortunately, although they can be frustrating, jet lag is temporary. As your body clock gradually synchronises with the local time, the symptoms usually improve on their own.

Sleep Disturbance

Sleep disruption is the symptom most people associate with jet lag, and it’s often the first sign that your body clock is still running on home time.

You might find yourself wide awake at three o’clock in the morning, unable to fall asleep until long after midnight or waking hours earlier than you intended. Equally, you may feel overwhelmingly sleepy during the middle of the day because, as far as your brain is concerned, it’s still night-time.

Even when you do sleep, it often feels lighter or more fragmented than usual. Many travellers describe waking repeatedly during the night or feeling as though they haven’t had a particularly refreshing sleep. This is perfectly normal while your circadian rhythm is readjusting and usually improves over the first few days.

Tiredness, Brain Fog And Poor Concentration

One of the more frustrating aspects of jet lag is that feeling tired isn’t always relieved by sleeping.

Even after what seems like a reasonable night’s rest, you may still feel unusually sluggish, mentally foggy or lacking in energy. Concentrating can become harder, simple tasks may take more effort than normal and you might notice yourself forgetting things, struggling to make decisions or reacting more slowly than you usually would.

It once affected me so badly that after almost two months of bouncing back and forth on different work trips back to back without a break, I forgot what country I was in and thought Romania was Moldova for two days!

That’s an extreme example, but it gives you an idea of what prolonged travel fatigue can do to your concentration.

This is one reason it’s worth taking things a little easier during your first day or two in a new destination. Navigating unfamiliar transport systems, driving a hire car or tackling an ambitious sightseeing itinerary is much easier once your concentration has caught up with your enthusiasm.

Changes In Appetite And Digestion

Your digestive system also follows your internal body clock, so it’s hardly surprising that it becomes confused when breakfast suddenly arrives in what your body still believes is the middle of the night.

Some travellers lose their appetite altogether, while others find themselves feeling hungry at unusual times of the day. Mild indigestion, bloating, constipation, diarrhoea or nausea can also occur during the first few days after crossing several time zones, particularly if you’ve been eating unfamiliar food or at irregular times during your journey.

These symptoms are usually short-lived and settle naturally as your eating pattern begins to match the local time.

Mood Changes

Jet lag doesn’t only affect your body; it can affect how you feel emotionally too.

Poor-quality sleep, mental fatigue and disruption to your normal routine often leave people feeling more irritable, less patient or generally ‘out of sorts’. You may feel less motivated than usual or simply not quite yourself during the first day or two after arriving.

This can be particularly disappointing when you’ve been looking forward to your trip for months, but it’s a normal part of the adjustment process rather than a sign that anything is wrong. As your sleep improves, your mood usually does too.

Travel Fatigue And Jet Lag Often Go Hand In Hand

Not everything you feel after a long-haul flight is necessarily caused by jet lag.

Even without crossing a single time zone, spending ten or twelve hours on an aircraft is physically and mentally tiring. Sitting in the same position for hours, sleeping poorly, navigating airports, carrying luggage and simply dealing with the demands of modern travel all contribute to what is often called travel fatigue.

This is why it’s quite common to arrive feeling completely exhausted after a long journey, even if you’ve only travelled north or south and haven’t changed time zones at all. Equally, if you’ve crossed half the world, you’ll often be dealing with both travel fatigue and jet lag simultaneously, which can make those first couple of days feel particularly draining.

The reassuring news is that both improve with time. As your body clock adjusts, you begin sleeping properly again and recover from the journey itself, you’ll usually notice yourself feeling better day by day. If that’s happening, you’re almost certainly recovering exactly as expected.

How To Reduce Jet Lag Before You Fly

Jet lag doesn’t begin when your plane lands. The choices you make in the days before you travel can have a surprisingly big impact on how quickly your body adapts once you arrive.

You can’t completely prevent jet lag, particularly if you’re crossing several time zones, but giving your body a head start makes adjusting much easier. A little planning before you leave home is often far more effective than trying to fix everything after you’ve landed.

Gradually Adjust Your Routine

If you’re travelling across several time zones, begin nudging your body clock towards your destination a few days before you leave. There’s no need to make dramatic changes or completely live on your destination’s schedule, but gradually moving your bedtime, waking time and even your meal times by an hour or so each day can help reduce the shock of the time difference.

If you’re travelling east, try going to bed and getting up a little earlier. If you’re travelling west, do the opposite by staying up slightly later and sleeping in where possible. Even small adjustments can make the transition feel less abrupt.

Prioritise Sleep Before You Travel

It can be tempting to spend the last few days before a trip rushing around packing, finishing work or squeezing in last-minute jobs, but arriving at the airport already sleep deprived puts you at an immediate disadvantage.

Jet lag is difficult enough without starting your journey exhausted. Aim for a few good nights’ sleep before you travel so your body is in the best possible position to cope with the disruption of crossing multiple time zones.

Start Thinking In Your Destination’s Time Zone

A simple but surprisingly effective trick is to begin mentally switching to your destination before you even board the aircraft.

Change the clock on your phone or watch to local time once you’ve checked in or boarded your flight and start thinking in terms of when you’ll be eating, sleeping and arriving there rather than back home. It sounds like a small thing, but making that psychological shift early helps you begin adapting to your new routine before you even land.

Keep Your Arrival Flexible

If your itinerary allows, resist the temptation to pack your arrival day with activities or commit yourself to a busy schedule during the first couple of days.

I get it isn’t always possible if you are on a short trip or travelling for work or something, but in general when backpacking or travelling independently you have the time and the flexibility to build in these buffer zones into your big trip. What I always do is pre book a private room for the first couple of nights, and just don’t plan anything other than sleep and rest.

Think of those first 48 hours as part of the journey rather than lost holiday time. Building in a little flexibility gives your body the opportunity to adjust naturally and means you won’t feel frustrated if you’re more tired than expected or don’t have the energy to do everything straight away.

After that, you’ll have so much more energy, you’ll feel so much better and you will be ready to start exploring properly, which usually makes the rest of your trip far more enjoyable.

What To Do During Your Flight

By the time you’ve boarded your flight, there’s no magic trick that will prevent jet lag altogether. If you’re travelling across several time zones, your body clock is going to need time to adjust, regardless of what you do in the air. What you can do, however, is avoid making that adjustment any harder than it needs to be.

Think of your flight as the first stage of adapting to your destination rather than simply enduring the journey. The decisions you make over the next several hours can influence how quickly your body settles into its new routine and how you feel during those important first days after you arrive.

Sleep And Rest With A Purpose

The old advice to simply “sleep on the plane if you can” isn’t particularly helpful because it ignores the most important factor: what time you’ll be arriving.

If you’re flying overnight and landing early in the morning, getting some sleep on the aircraft usually makes good sense. Even if it’s nowhere near as restful as sleeping in your own bed, a few hours of sleep can make it much easier to stay awake through the day and reach a sensible local bedtime. On the other hand, if you’re due to arrive late in the evening, sleeping for most of the flight may simply leave you wide awake when you finally check into your accommodation.

Don’t worry if you struggle to sleep. Aircraft cabins are noisy, cramped and full of interruptions, so it’s perfectly normal to only doze lightly or not sleep at all. Rest is still valuable. Closing your eyes, listening to music, reading a book or simply relaxing reduces the mental and physical fatigue that naturally builds up during a long journey, even if you never properly fall asleep.

The goal isn’t to force yourself to sleep. It’s to use the journey to begin aligning your rest with the time at your destination while arriving as refreshed as circumstances allow.

Eat, Drink And Think In Your Destination’s Time Zone

Your body clock doesn’t only regulate sleep. It also influences when you naturally feel hungry, how efficiently your digestive system works and even how your metabolism responds throughout the day. That’s one reason why your stomach can feel completely out of sync after crossing several time zones.

Once you’re on board, begin thinking in terms of your destination rather than where you’ve come from. If it’s breakfast time where you’re going, have breakfast. If it’s approaching bedtime, avoid treating the flight like an all-night buffet simply because the airline happens to be serving another meal.

The same principle applies to hydration. Aircraft cabins are much drier than most indoor environments, meaning you lose more moisture through your skin and breathing during a long flight. While dehydration doesn’t actually cause jet lag, it does contribute to headaches, dry eyes, fatigue and that general feeling of being run down, all of which can make jet lag seem much worse than it really is.

Drink water regularly throughout the flight, particularly on longer journeys, but don’t feel you have to obsess over exact amounts. The aim is simply to stay comfortably hydrated rather than trying to compensate by drinking excessive quantities.

Alcohol and caffeine also deserve a little common sense. A glass of wine with your meal or a morning coffee isn’t going to destroy your body’s internal clock, but neither should be relied upon as a solution. Alcohol often reduces the quality of sleep, even if it makes you feel drowsy initially, while caffeine is most helpful when it’s used to support your destination’s daytime rather than your departure point. Timing is far more important than complete avoidance.

Keep Moving Whenever You Can

Long-haul flights aren’t particularly kind to the human body. Sitting in a confined space for eight, ten or even fifteen hours leaves most people feeling stiff, sluggish and generally uncomfortable by the time they land.

Getting up every couple of hours when it’s safe to do so, stretching your legs and walking around the cabin for a few minutes won’t cure jet lag, but it will help reduce muscle stiffness, improve circulation and leave you feeling physically better when you arrive. Gentle stretches in your seat and simple ankle or calf movements are also worthwhile during longer periods when you can’t leave your seat.

Just as importantly, moving around helps break up the monotony of a long flight. It encourages you to drink some water, resets your posture and provides a welcome change from sitting in the same position for hours. Those small improvements all contribute to arriving feeling less fatigued, giving your body one less challenge to overcome as it starts adjusting to a new time zone.

If you’re interested in the wider health aspects of long-haul flying, including hydration, circulation, deep vein thrombosis (DVT) and staying comfortable during extended flights, I’ve covered those topics in much more detail in my complete guide to staying healthy on long-haul flights.

What To Do After You Arrive

The first day or two after you arrive is where the battle against jet lag is usually won or lost.

Your body is trying to make sense of a completely new schedule. It doesn’t know you’ve arrived in New York, Singapore or Sydney. As far as your internal clock is concerned, it’s still operating on the time back home. The decisions you make over the next 24 to 48 hours provide the signals your brain uses to reset itself, so it’s worth getting them right.

The temptation is to do whatever feels most comfortable. If you’re exhausted, you crawl into bed. If you’re wide awake at three in the morning, you put the television on. If you’re hungry in the middle of the night, you raid the minibar. While none of these things are disastrous on their own, repeatedly following your old body clock only reinforces it, making the adjustment take longer.

Instead, your aim is to start living as though your destination’s time zone is already your normal routine. It won’t feel natural immediately, but that’s precisely how your body begins to adapt.

Get Outside Into Natural Daylight

If there is one piece of advice that consistently appears in sleep medicine research, it is to expose yourself to natural daylight as soon as reasonably possible after arriving.

Light is the strongest signal your body uses to regulate its circadian rhythm. Think of it like Superman using the sun to recharge, When daylight reaches your eyes, it helps suppress melatonin, promotes wakefulness and tells your brain that it’s daytime, even if every fibre of your body is insisting it should still be asleep.

You don’t need to spend hours in the sunshine for this to work. Simply getting outside for a walk, sitting at an outdoor café, exploring the local neighbourhood or eating lunch in a park provides a much stronger signal than remaining indoors all day. Fresh air and gentle exercise are welcome bonuses, but it’s the daylight itself that’s doing most of the work.

Live By The Local Clock

As soon as you arrive, start behaving as though you’ve always lived there.

Eat meals at normal local meal times, even if your appetite hasn’t caught up yet. Stay awake until a sensible local bedtime whenever you can, even if that means feeling tired for a few hours. Get up at a normal time the following morning instead of trying to catch up on sleep by staying in bed until lunchtime.

This is one of the hardest parts of recovering from jet lag because your body often feels as though it’s fighting against you. The important thing is consistency. Every meal, every bedtime and every morning you spend following the local routine helps reinforce your new schedule and gradually weakens the old one.

Use Naps Carefully

Sometimes, despite your best intentions, staying awake simply isn’t realistic.

If you’ve spent twenty hours travelling, crossed ten time zones and barely slept on the aircraft, a short nap may be exactly what you need to function safely and enjoy the rest of the day.

The key is keeping it short. Around 20 to 30 minutes is usually enough to improve alertness without leaving you groggy or making it much harder to sleep later that evening. Sleeping for several hours in the middle of the afternoon, on the other hand, often resets your body back towards your home time zone and can leave you lying awake for half the night.

If you do nap, set an alarm, get back up and continue following the local day.

Give Yourself Permission To Slow Down

This is one of the biggest travel lessons I’ve learned over the years, and it’s advice I follow almost every time I cross multiple time zones.

Whenever possible, don’t plan anything particularly important for your first couple of days. Avoid booking expensive tours, complicated journeys or activities that depend on you being full of energy from the moment you arrive.

Instead, use those first 48 hours to settle in properly. Enjoy your private room. Have a good nights sleep without having to get up early. Wander around your local area, no more than a street or two, just to get your bearings. Find somewhere good to eat. Sit with a coffee and watch the city wake up around you. Let yourself absorb the atmosphere rather than racing to tick attractions off a list.

This approach has a practical benefit as well as a psychological one. If you wake at four in the morning, feel unusually tired after lunch or find yourself wanting an early night, it doesn’t matter because you’ve deliberately left yourself the flexibility to adapt naturally.

Perhaps more importantly, those slower first days often become some of the most rewarding parts of a trip. You’re no longer rushing from one landmark to the next. You’re beginning to understand the rhythm of a place, noticing details you might otherwise miss and giving yourself the chance to arrive properly, not just physically but mentally as well. By the time you’re ready to explore in earnest, your body has usually caught up too.

Should You Take Melatonin For Jet Lag?

Melatonin has become one of the most talked-about remedies for jet lag, and unlike many products marketed to travellers, there is growing evidence that it can help. The important word, however, is help.

The research suggests that melatonin may reduce the severity of jet lag and help some people adjust to a new time zone a little more quickly, particularly after crossing several time zones or travelling east. Those benefits appear to be genuine, but they are also fairly modest. Melatonin is not a miracle cure, it won’t instantly reset your body clock and it certainly won’t allow you to ignore the basic principles of recovering from jet lag.

In reality, most travellers manage perfectly well without it.

For the vast majority of people, exposing yourself to daylight, following the local schedule, getting enough sleep and allowing your body a couple of days to adjust will have a far greater impact than any tablet. Your body already knows how to reset its internal clock; it simply needs a little time to do so.

That doesn’t mean melatonin has no place. Some travellers do find it helpful, particularly on demanding itineraries where they need to function quickly after arrival, but it should be viewed as an optional aid rather than something every traveller needs to pack.

There is another practical consideration too. The legal status of melatonin varies considerably around the world. In some countries it is sold over the counter as a dietary supplement, while in others it is available only on prescription or is subject to tighter controls. If you intend to travel with it, don’t assume that because you can buy it at home you can automatically take it into another country.

Most importantly, melatonin isn’t suitable for everyone. It can interact with certain medications and may not be appropriate for people with some medical conditions, or during pregnancy or breastfeeding. If you’re considering using melatonin for jet lag, speak to your GP, pharmacist or travel health nurse before you travel. They can advise whether it’s appropriate for you and, just as importantly, how and when to use it correctly, because timing is far more important than simply taking a tablet.

For most travellers, though, the question is a simple one: is it really worth it?

If your itinerary allows you a day or two to recover naturally, you’ll probably find that good sleep, natural daylight, sensible planning and a little patience achieve exactly the same result, without needing to rely on medication at all. That’s still the simplest, safest and, for most people, the most effective way to beat jet lag.

Should You Take Sleeping Tablets For Jet Lag?

Many travellers wonder whether sleeping tablets are the answer to jet lag. After all, if the problem is sleeping at the wrong time, surely a tablet that helps you sleep solves the issue?

Unfortunately, it isn’t that simple.

Sleeping tablets don’t reset your body clock. They may help some people sleep during the first night or two after arrival, but they don’t treat the underlying cause of jet lag, which is the mismatch between your internal circadian rhythm and the local time.

Both the NHS and the CDC take a cautious approach. Neither recommends sleeping tablets as a routine treatment for jet lag. Instead, they emphasise that the foundations of recovery remain the same: exposure to natural daylight, following the local schedule, getting enough rest and allowing your body time to adjust naturally.

Sleeping tablets also have disadvantages. They can cause next-day drowsiness, affect concentration and coordination, and increase the risk of falls or accidents in some people. They can also interact with other medicines and are not suitable for everyone. On board an aircraft, they may leave you sleeping so deeply that you move around less than you otherwise would, which is another reason they should never be taken casually on a long-haul flight.

That doesn’t mean they are never appropriate. In some circumstances, a doctor may recommend a short course for a particular traveller, especially if there are exceptional circumstances or previous experience suggests it would be beneficial. However, that decision should always be made on an individual basis.

If you’re considering taking sleeping tablets for jet lag, speak to your GP or travel health nurse before you travel. They can advise whether they are appropriate for you, discuss any potential risks or interactions with your existing medication, and explain how to use them safely if they are prescribed.

For most travellers, however, sleeping tablets simply aren’t necessary. Good sleep habits, sensible planning and giving your body a little time to adapt remain the safest and most effective way to recover from jet lag naturally.

How Long Does Jet Lag Last?

One of the questions I get asked about jet lag most often is, ‘How long before I feel normal again?’

The honest answer is that it depends. There isn’t a fixed timetable because everyone adapts at a slightly different rate. Your age, your usual sleep patterns, the number of time zones you’ve crossed, the direction you’ve travelled and even how well you’ve slept during your journey can all influence how quickly your body clock adjusts.

As a general rule, most people begin to feel noticeably better within a couple of days, although recovering completely after crossing many time zones can take around a week or, occasionally, a little longer.

A useful rule of thumb is that your body adjusts by around one time zone per day. It’s only a rough guide rather than a precise calculation, but it explains why a flight across three or four time zones may leave you feeling out of sync for just a few days, whereas travelling halfway around the world often takes longer to recover from.

Travelling east usually feels more difficult than travelling west because advancing your body clock is generally harder than delaying it. This is why a journey from London to Bangkok or Tokyo often leaves people feeling more affected than returning home along the same route.

The good news is that the worst symptoms rarely last for the entire adjustment period. Most travellers find that the overwhelming tiredness, brain fog and sleep disruption improve significantly after the first two or three days, even if their body clock is still gradually settling into the new time zone.

The most important thing is not to become frustrated if recovery takes a little longer than you’d hoped. Jet lag isn’t a sign that something is wrong or that you’re failing to cope with travel. It’s simply your body’s normal response to crossing multiple time zones faster than your internal clock can keep up.

If you’ve followed the advice in this guide, are getting enough rest and are gradually feeling better each day, then everything is probably progressing exactly as it should. Patience really is one of the most effective treatments for jet lag.

When It Isn’t Just Jet Lag

Jet lag has a habit of becoming the convenient explanation for almost everything you feel after a long-haul flight. You’re tired, you’re sleeping badly, your concentration isn’t what it should be and your appetite is all over the place, so it’s easy to assume every symptom is simply part of adjusting to a new time zone.

Most of the time, you’d be right.

The difficulty is that long-distance travel can affect your body in several different ways at once. Jet lag often overlaps with ordinary travel fatigue, which is the physical and mental exhaustion that comes from spending many hours travelling, sleeping poorly on the aircraft and being away from your normal routine. The two frequently occur together, making it difficult to separate one from the other during the first day or two after you arrive.

The important thing to remember is that jet lag follows a fairly predictable pattern. Sleep disturbance, tiredness, reduced concentration, irritability and changes in appetite are all common, and they should gradually improve as your body clock adjusts to the local time. You may have good days and bad days, but the overall trend should be one of steady improvement.

If that isn’t happening, it’s worth considering whether something else might be contributing.

Travelling also means exposure to different climates, unfamiliar food and water, new environments and, depending on your destination, infectious diseases that simply don’t exist at home. Symptoms such as a persistent fever, an ongoing cough, severe diarrhoea or vomiting, a widespread rash or any illness that continues to worsen rather than gradually improve are not typical features of jet lag and shouldn’t automatically be dismissed as part of the adjustment process.

The same applies if your symptoms persist for much longer than you would reasonably expect. Most people begin to feel noticeably better within a few days, even after crossing multiple time zones. If overwhelming fatigue, significant sleep disturbance or other symptoms show little sign of improving after a week, or they’re becoming worse instead of better, it’s sensible to seek medical advice rather than assuming jet lag is still to blame.

As a general rule, trust the pattern as much as the symptoms themselves. If you’re gradually feeling better each day, you’re probably experiencing exactly what you’d expect after crossing several time zones. If your symptoms don’t fit the usual pattern of jet lag, are unusually severe or simply don’t seem to be improving, don’t put everything down to your flight. It may be time to seek advice from a local healthcare professional.

Frequently Asked Questions About Jet Lag

Can you completely prevent jet lag?

No. If you cross several time zones, some degree of jet lag is a normal biological response. Your body simply cannot reset its internal clock instantly. What you can do is reduce how severe it feels and help your body adjust more quickly by preparing before you travel, following the local schedule after you arrive, getting plenty of natural daylight and giving yourself time to recover.

Is travelling east really worse than travelling west?

For most people, yes.

Travelling east usually requires your body clock to move forwards, meaning you have to fall asleep earlier than your body naturally wants to. Travelling west generally involves staying awake a little later instead, which most people find easier. That is why journeys to destinations such as Asia or Australia often feel more challenging than travelling to North America across a similar number of time zones.

Does dehydration cause jet lag?

No.

Jet lag is caused by the mismatch between your body’s internal clock and the local time after crossing multiple time zones. Dehydration doesn’t cause jet lag, but it can leave you feeling more tired, sluggish and generally unwell, making the symptoms feel worse. Staying hydrated is therefore an important part of recovering comfortably, even though it doesn’t directly reset your body clock.

Should I stay awake when I arrive?

In most cases, yes.

If you arrive during the day, try to stay awake until a sensible local bedtime, even if you feel tired. This helps your body begin adapting to the new time zone more quickly. If you’re completely exhausted, a short nap of around 20 to 30 minutes may help, but longer daytime sleeps are more likely to delay your adjustment.

Does melatonin cure jet lag?

No.

There is growing evidence that melatonin can help some travellers reduce the severity of jet lag and adjust a little more quickly, particularly after travelling east, but the effects are generally modest. It isn’t essential, it isn’t a miracle cure and most travellers recover perfectly well without it. If you’re considering using melatonin, speak to your GP, pharmacist or travel health nurse before you travel to make sure it’s appropriate for you.

Are sleeping tablets a good idea for jet lag?

Usually not.

Sleeping tablets don’t reset your body clock and aren’t routinely recommended for treating jet lag. They may be appropriate for some people in specific circumstances, but only on the advice of a medical professional. For most travellers, allowing your body to adjust naturally remains the safest and most effective approach.

How long does jet lag usually last?

Most people begin to feel noticeably better within two or three days, although recovering completely after crossing many time zones can take around a week. A useful rule of thumb is that your body adjusts by roughly one time zone per day, but this varies from person to person.

Is jet lag worse as you get older?

It can be.

Many older travellers find that recovering from jet lag takes a little longer than it did when they were younger. Changes in sleep patterns that occur naturally with age may make it slightly harder for the body to adapt quickly, although the same principles for reducing jet lag still apply regardless of age.

Can children get jet lag?

Yes, although they often adapt surprisingly well.

Babies, children and teenagers can all experience jet lag after crossing multiple time zones, but the symptoms vary considerably depending on their age. Keeping meals, naps and bedtime as close to the local schedule as possible usually helps them adjust more quickly, although parents should expect a few disrupted days after a long-haul journey.

Is jet lag dangerous?

For most healthy people, no.

Jet lag is a temporary disruption to your body’s internal clock rather than an illness or disease. Although it can leave you feeling tired, irritable and unable to concentrate for a few days, it isn’t usually harmful. However, if you develop symptoms that aren’t typical of jet lag, such as a high fever, severe breathlessness, chest pain or persistent vomiting, seek medical advice rather than assuming it’s simply the effects of travel.

The Best Way To Beat Jet Lag? Give Yourself Time

Jet lag is one of the few travel inconveniences that simply can’t be beaten through clever planning or expensive products. Even experienced travellers still get it, so even that isn’t any protection from it! In fact I’m probably more susceptible to it now I’m a grumpy old man in my late forties than when I was a fresh faced teenager first starting to travel! This is because dealing with jet lag asks you to do something many of us struggle with: slow down, be patient and let your body catch up. This is one area where over 25 years of experience does help.

That experience teaches you how to prepare, how to slow down, and how to rest. And that is really all it takes.

Despite all the supplements, gadgets, apps and miracle cures you’ll find online, there is still no shortcut that completely eliminates jet lag. Your body has evolved to follow the rising and setting of the sun, not to adapt instantly after crossing half the world in a few hours.

The encouraging news is that your body is remarkably good at resetting itself. For most healthy travellers, all it really needs is the right conditions and a little patience.

If you prepare before you travel, stay hydrated during your flight, expose yourself to natural daylight after you arrive, eat and sleep according to the local time and resist the temptation to overdo things during your first couple of days, you’ll usually recover far more quickly than you might expect. None of those strategies are particularly complicated, but together they are far more effective than relying on supplements or medication alone.

One of the best things you can do for yourself after a long journey is simply accept that you’ve travelled halfway around the world. Your body isn’t malfunctioning; it’s adapting. Give yourself permission to slow down for a day or two, wander without an itinerary, enjoy a good meal, get some fresh air and let your internal clock catch up.

Those gentle first days often become some of the most memorable parts of a trip. Instead of rushing from one famous sight to the next, you have time to notice the rhythm of a new place, discover a favourite café, get pleasantly lost in unfamiliar streets and begin to settle into your destination naturally.

Before long, you’ll be sleeping normally again, your energy will return and your body clock will quietly catch up. Then you can get on with the reason you travelled in the first place: enjoying the adventure.