What is jet lag?

Jet lag is your circadian rhythm’s reaction to a rapid change in time zone. Symptoms: fatigue, sleep disturbances, digestive problems, mood swings. Duration: 1 day per hour of time difference. If you ignore it, you’ll lose concentration, productivity, and sleep quality during the first few days.

Jet lag is an all-too-familiar phenomenon for many travelers on long-haul flights: a new time zone means sleepless nights. This annoying disruption of the natural sleep-wake cycle is caused by rapid changes in time zones, which throw the body off balance.

Our biological clock, also known as the circadian rhythm, regulates sleep, wakefulness, hunger, performance, and other vital functions. When we travel across different time zones, this clock gets thrown off sync because it was accustomed to the old time zone and isn’t immediately synchronized with the new environment.

This time difference between the time in the country of origin and the destination is perceived by our bodies as a disruption—one that can make getting started considerably more difficult.

“The more we talk about jet lag and anticipate it, the more we feel it.”

— Anna West, Sleep Performance Coach

Below, we’ll explain the causes of jet lag and its various symptoms, and provide practical tips to help alleviate its exhausting effects. We’ll also show you how to support your body’s natural rhythm during acclimatization so you can enjoy your travels without the unpleasant side effects of jet lag.

Symptoms & Duration: What’s Normal—and How Long Does It Last?

Jet lag symptoms can vary widely and often involve more than just a simple disruption of your circadian rhythm. The symptoms can be distressing, and it’s important to understand them so we can develop effective strategies for relief.

How long does jet lag last?

The duration of jet lag varies depending on the body’s individual ability to adapt and the direction of travel. Generally, the human body is able to acclimate at a rate of one day per time zone.

This means that if, for example, you travel across five time zones, it takes about five days for your body to fully adjust. In other words, your body needs one day to adjust for every hour of time difference. However, how well you cope with the time change also depends on individual factors.

It’s important to note that the duration of jet lag varies from person to person and can depend on age, gender, health status, and personal sleep patterns. Older adults, women, and people with existing sleep problems may take longer to adjust. Younger people, on the other hand, tend to adapt more easily to new time zones and therefore tend to experience fewer jet lag effects.

To shorten the duration of your jet lag, you can use various strategies before departure that are applicable regardless of age. Examples include gradually adjusting your sleep schedule to the new time zone or consciously eating meals according to the destination’s schedule.

Following these tips can help you adjust your body to the new environment more quickly and minimize the effects of jet lag.

Jet Lag Sleep Disorders

You’ve arrived at your faraway vacation destination and are excited for your first day of vacation. But sleep just won’t come. It’s the classic “first night” effect.

Crossing time zones throws the body’s natural sleep rhythm out of balance. That’s because your body is programmed to be active or at rest at specific times. When these patterns are disrupted due to a different time zone, your sleep can be significantly affected.

In this case, the next day doesn’t start as you’d hoped, but with persistent fatigue, since your body hasn’t gotten the rest it needs.

The severity of sleep disturbances varies from person to person and also depends on the direction of travel.

Westward flights—that is, travel in a westerly direction, such as from Hamburg or Berlin to the U.S. or other North American countries—effectively extend the day. This can make it easier to fall asleep. Traveling eastward, on the other hand, can lead to difficulty falling asleep, as the day is shortened.

However, the time of the flight and behavior on the plane are also important factors in how the body reacts to the stress of travel.

To minimize sleep disturbances caused by jet lag, it’s helpful to adjust your sleep schedule before the trip and make a conscious effort to get enough rest during the flight.

Gradually adjusting to the new schedule at your destination can also help gently prepare your body for the changed sleep habits and thus mitigate the negative effects of the trip.

Once you arrive at your destination, it’s important to adjust to the local time as quickly as possible and expose yourself to daylight.

This means: Don’t sleep in until noon; instead, set your alarm, go outside, and signal to your body that it’s time to be awake.

In the evening, however, you should avoid light and, just as you would at home, establish a bedtime routine to reset your sleep-wake cycle. This can help prevent long-term sleep disturbances caused by jet lag.

Avoiding Jet Lag, Overcoming Jet Lag

Jet lag is an almost inevitable challenge for travelers. Especially on long-haul flights across multiple time zones, there is a very high risk of experiencing jet lag symptoms after landing. Overcoming jet lag sometimes requires patience and a strategic approach. There are a variety of proven methods to help your body quickly adjust to the new time zone. With our tips and tricks, you can help yourself minimize jet lag and effectively alleviate its effects.

Tips for Dealing with Jet Lag

You’ll find an overview of proven strategies and information for avoiding—or at least minimizing—jet lag here.

These tips can help you overcome jet lag more quickly and reduce the duration of its effects. This will make your flight more enjoyable—guaranteed. However, it’s important to give your body time to adjust to the new time zone. Forcing yourself to sleep usually doesn’t help. Use the measures mentioned here mindfully, and they’ll have a positive impact on your trip.

It should be noted, however, that early-morning flight times and the resulting need to wake up early can disrupt your circadian rhythm even before you arrive at your destination. With this additional challenge, it can sometimes be even harder to adjust to the new time zone. This makes it all the more important to consistently try to adjust to the new time zone. If you do happen to wake up in the middle of the night, stay calm and avoid exposure to artificial light, such as from your cell phone.

You can find strategies for falling asleep more easily here:

The 2026 World Cup (June 11–July 19) is a record-breaking travel tournament with three host countries, up to a 9-hour time difference, and matches at high altitudes like Mexico City. Sleep Performance Coach Anna West identifies three non-negotiable factors: heat, altitude, and time zone differences—and explains how pros and fans cope with them.

“In an ideal world, you wouldn’t have differences in humidity, temperature, or altitude—but you will. These are non-negotiables. The goal isn’t to crash into a wall—it’s to go around it.”

— Anna West, Sleep Performance Coach

Time Zone Differences Table:

Using Melatonin to Combat Jet Lag

Many people who have trouble falling asleep or suffer from insomnia turn to aids. Melatonin, in particular, is often touted as a sleep regulator. Melatonin is a natural hormone produced in the pineal gland of the brain that plays an important role in regulating the sleep-wake cycle. Since melatonin can also be taken as a dietary supplement and is freely available in many products, it is often used for self-treatment of sleep problems.

Melatonin can also be a strategy for better coping with the negative effects of jet lag caused by a change in time zones. This is because the so-called “sleep hormone” prepares the body for sleep. However, when taken in commercially available doses, melatonin is only of limited effectiveness as a sleep aid. While studies suggest that taking melatonin specifically before bedtime can help speed up the adjustment of the sleep-wake rhythm to the new time zone, the effects are sometimes minimal. And, as always, it depends on the dose.

Melatonin is generally not dangerous, but it should be used with caution. Above all, the dosage should be discussed with a doctor and adjusted on an individual basis. Consulting a doctor is especially advisable if you are already taking medication for other conditions or have health concerns.

Under no circumstances is melatonin a miracle cure. Every body reacts differently to supplemental melatonin. So you shouldn’t rely solely on pills or sprays, but rather use them in combination with the jet lag management methods mentioned above.

Conclusion

Jet lag is a common side effect of traveling across different time zones that can disrupt the sleep-wake cycle. To alleviate symptoms, strategies such as gradually adjusting your sleep schedule, staying well-hydrated, and getting exposure to sunlight at your destination can be helpful. Melatonin may provide additional support, but should be used in consultation with a doctor.

However, a vacation under the palm trees doesn’t have to be marred by fatigue, as there are numerous proven strategies to minimize jet lag and make it easier to adjust to the new day-night cycle.

Gradually adjusting your own sleep-wake rhythm before your trip is one of the most effective ways to combat jet lag. By aligning your bedtime and wake-up times at home with those of your destination, you give your body the opportunity to slowly adjust to the new time zone. Consciously exposing yourself to natural light at your destination also plays a crucial role in synchronizing your body clock.

You shouldn’t underestimate the importance of staying hydrated during the flight. The dry air in airplanes can lead to dehydration and exacerbate the effects of jet lag. Therefore, it’s advisable to always drink enough water to keep your body hydrated. Alcohol and caffeine, on the other hand, are harmful.

Taking melatonin as needed can be another option to help regulate your sleep-wake cycle a bit more quickly. In most cases, however, you should be able to manage without any aids by following a schedule, exercising, and adjusting your diet.

One thing is clear: there’s no one-size-fits-all solution for jet lag. And normally, anyone who flies across multiple time zones is affected by it. However, you can develop the strategy that works best for you. Combining several approaches—such as gradual adjustment, staying well-hydrated, and possibly taking melatonin as needed—should definitely help you minimize the effects of jet lag. We wish you a wonderful vacation.