Jet Lag: Everyday Ways to Adjust Your Sleep After Travel

Jet lag is a temporary sleep problem that can occur when you travel across several time zones, such as on a long-haul flight. This change can disrupt your internal body clock (circadian rhythm), which influences when you feel awake or sleepy. The result is difficulty falling asleep at bedtime in your new location, waking up too early or too late, and feeling tired during the day. Most adults will experience jet lag at some point if they travel long distances, especially east or west, and its impact can vary from person to person. The good news is that, according to the NHS, disturbed sleep linked to jet lag usually gets better within a few days as your body clock naturally adjusts to the new time zone. While the effects can be uncomfortable, making simple adjustments and being patient with your body can help you start to feel like yourself again more quickly.

Jet lag occurs because your natural sleep and wake cycle—also known as your circadian rhythm—gets out of sync with the local time at your destination. For example, if you travel from London to New York, you cross several time zones, but your body clock is still set to UK time. Exposure to light and darkness at new hours confuses your body’s signals for when to sleep and wake, often making you feel sleepy or alert at odd times. This adjustment is usually harder when flying east (for example, from New York to Europe) because you lose hours, while flying west (like London to Los Angeles) means you effectively gain hours, which can also be disruptive but is often a little easier for many people. Several factors—including age, overall health, and travel habits—can influence how strongly jet lag affects you and how quickly you recover.

The main symptoms of jet lag are difficulty getting to sleep or staying asleep, waking very early, or waking up feeling unrefreshed. Many people also notice excessive sleepiness or grogginess during the day, reduced concentration, and sometimes changes in mood. Digestion and appetite can be affected too. Symptoms may appear after any long-haul flight that crosses three or more time zones and can differ for each individual and each trip. Mild symptoms are normal and usually fade as your body adjusts, but persistent or severe sleep problems may indicate a different issue that is best discussed with a healthcare professional--especially if you have other health conditions that are worsened by poor sleep.

For most adults, jet lag symptoms are short-lived, commonly improving within a few days as your body clock realigns with the local time. According to the NHS, there is no guaranteed timetable for recovery, and how quickly you bounce back depends on individual differences like age, travel direction, and your sleep habits before and during your trip. Flying east may lengthen the adjustment period for some people, while flying west is sometimes less challenging. It's also possible to feel no symptoms on one trip and more noticeable effects on another, even with similar routes. While some tips may help you adjust, a fixed remedy or shortcut does not exist and claims of instant recovery are unproven. Remember, persistent or very disruptive sleep problems after travel may indicate another sleep issue and warrant professional attention.

A smooth jet lag sleep adjustment often begins before you step on the plane. If possible, plan for rest before your journey—aim for regular, restorative sleep for several nights before departure to minimize sleep debt. When practical, gradually shifting your bedtime closer to your destination’s time zone in the days leading up to travel may help some adult travellers adapt more easily, though this isn't always feasible for everyone. Organise your travel schedule so that you arrive during daylight if possible, making it easier to align to the local time. Pack an eye mask, earplugs, and comfortable travel clothing to promote rest during the flight. Finally, mentally preparing for a temporary disruption in your routine and setting realistic expectations can reduce frustration and help with adjustment.

Long flights provide an opportunity to start supporting your body’s transition. During the journey, stay hydrated by drinking water regularly and avoid excessive alcohol or caffeinated drinks, as these can affect sleep and dehydration. Periodic gentle movement—such as walking along the aisle and stretching your legs—can help maintain comfort and circulation. If your arrival time at the destination will be in the morning or afternoon, try to rest or nap on the plane (using an eye mask or earplugs to shield against noise and light) so you’ll feel more refreshed upon landing. Conversely, if you’re set to land in the evening, try to stay awake during the flight so you're more likely to sleep at local bedtime. Listen to your body but begin shifting your habits in small, practical ways to nudge your body clock in the right direction.

The first few days after you arrive are a critical time for jet lag sleep adjustment. Try to adopt the local schedule right away by setting your meals and sleep times to match your new time zone, even if you feel tired. Exposure to natural daylight—especially in the morning—helps reset your body clock, so spend time outdoors early in the day. Avoid long daytime naps if possible, as these can make it harder to fall asleep at night. If you need to nap, keep it short (around 20 minutes) to minimize disruption. At bedtime, create a sleep-friendly environment by dimming the lights, limiting screen use in the hour before sleep, and making your room cool and quiet. Establish a wind-down routine, such as reading, meditation, or listening to soothing music, to help your body recognise it’s time for rest in the new time zone.

Your sleeping environment and bedtime routines can significantly influence how well you adapt to a new time zone. Make your sleeping area quiet, cool, and dark with blackout curtains or an eye mask. Avoid bright screens and stimulating activities just before bedtime as these can delay sleep. Gentle stretches, calming music, or a warm shower may signal to your body that it’s time to wind down. Try to maintain a regular bedtime and wake time within the local schedule, even on weekends during travel or when staying in a hotel. If you wake up in the night, keep lights dim and avoid checking the time, as this may make it harder to fall back asleep. Remember that patience is important, as your body may need several days to fully adjust after changing time zones.

Jet lag usually settles on its own, but there are situations in which professional advice may be appropriate. If sleep difficulties are severe, persist beyond a week, or have a significant impact on your health or daily life, consult a healthcare professional. NHS UK guidance currently does not recommend melatonin for jet lag, and supplements for sleep are not a replacement for medical care. Persistent sleep disruption may signal an underlying sleep disorder or another health concern, especially if accompanied by snoring, breathing difficulty, or other symptoms. Travel can also interact with existing conditions or medications, so if you have a health condition worsened by sleep disturbance, seek tailored advice before and after your journey. Healthcare professionals can suggest supportive strategies or investigate possible sleep disorders to help you get back on track.