Landing feeling wide awake at 3am, or unable to keep your eyes open during a mid-afternoon meeting, is one of the most common complaints after a long-haul flight. Jet lag is not just tiredness, it is a genuine, temporary disruption to your body’s internal clock, and how long it lasts depends on more than just how far you have flown.
Contact us or book a travel consultation to prepare properly for your next long-haul trip.
Quick Answer
As a general rule of thumb, jet lag takes roughly one day to resolve for each time zone crossed, though this varies from person to person. Travelling eastward is typically harder to adjust to than travelling westward, and factors such as age, sleep quality, alcohol and how well you prepare before you fly can all affect how long symptoms last. Our travel clinic can help you plan ahead, and this is also a good opportunity to check whether you need any vaccines for your specific destination.
1. What Actually Causes Jet Lag?
Jet lag happens when you cross multiple time zones faster than your body’s internal clock, known as your circadian rhythm, can adjust. This internal clock governs when you feel alert or sleepy, and it is influenced heavily by light exposure, meal timing and habit. Fly from the UK to somewhere several hours ahead or behind, and your body is left trying to run on a schedule that no longer matches the sun outside your window.
2. How Long Does Jet Lag Typically Last?
Recovery time varies considerably between individuals, but a commonly used rule of thumb is roughly one day of adjustment for every time zone crossed. This is only a general guide, and some people recover faster while others take longer, particularly on longer journeys.
| Time Zones Crossed | Typical Adjustment Period | Example Route |
|---|---|---|
| 1 to 3 | 1 to 3 days | UK to Middle East |
| 4 to 6 | 4 to 6 days | UK to East Coast USA or East Africa |
| 7 to 9 | 7 to 9 days | UK to West Coast USA or South Asia |
| 10 or more | Up to 10 days or longer | UK to Australia or New Zealand |
3. Why Some People Recover Faster Than Others
- ⇾ Direction of travel: Flying eastward is generally considered harder to adjust to than flying westward, since it usually means shortening your day rather than lengthening it, which most people’s internal clocks struggle with more
- ⇾ Age: Jet lag recovery can take longer in older adults, partly due to changes in sleep patterns and circadian flexibility that come with age
- ⇾ Sleep quality on the flight: Poor or fragmented sleep during a long-haul flight tends to worsen and prolong jet lag symptoms on arrival
- ⇾ Alcohol and caffeine: Both can disrupt sleep quality further and are worth limiting during travel, even though they may feel like a helpful pick-me-up at the time
- ⇾ Pre-flight preparation: Gradually shifting your sleep and meal times in the days before you travel can meaningfully reduce how long jet lag lasts once you land
- ⇾ Light exposure after arrival: Getting outside in daylight at the right times, and avoiding bright light at the wrong times, plays a significant role in how quickly your body clock resets
4. Our Jet Lag Support Services
Preparing for jet lag does not need to be guesswork. As part of a pre-travel consultation, our team can help you put together a personalised plan for your specific route, taking into account your direction of travel, flight timings, and any health conditions that might affect how well you adjust.
- ⇾ Guidance on adjusting your sleep and meal schedule in the days before departure
- ⇾ Advice on light exposure timing to help reset your body clock more quickly on arrival
- ⇾ Discussion of whether short-term sleep support, such as melatonin, may be appropriate for your circumstances, including current availability and suitability
- ⇾ Practical strategies for managing jet lag on business trips, family visits or once-in-a-lifetime holidays where you want to make the most of your time away
- ⇾ Advice tailored to travelling with children or older relatives, who often experience jet lag differently to fit, healthy adults
5. While You Are Planning: Check Your Destination Vaccines Too
A long-haul trip is also the perfect opportunity to make sure your vaccinations are in order, since preparing for one aspect of travel health naturally leads into the other. Depending on where you are headed, our travel clinic can advise on and administer a range of destination-specific vaccines and preventative treatment, including:
| Vaccine / Prevention | Typically Recommended For |
|---|---|
| Yellow fever | A single dose administered at our registered Yellow Fever Vaccination Centre; sometimes a legal entry requirement for parts of Africa and South America |
| Hepatitis A | Commonly recommended for destinations across Asia, Africa, and Central or South America, depending on local food and water hygiene standards |
| Typhoid | Often recommended alongside hepatitis A for similar destinations, particularly for longer stays or travel off the typical tourist route |
| Hepatitis B | Considered for longer stays, travellers likely to need medical or dental treatment abroad, and those working in healthcare or with close community contact |
| Rabies | Recommended for travellers to higher risk regions, particularly those visiting rural areas, undertaking outdoor activities, or at higher risk of animal contact, especially where access to prompt post-exposure treatment may be limited |
| Dengue fever | Vaccine availability and eligibility is more limited than other travel vaccines and often depends on prior dengue exposure; assessed individually rather than offered broadly |
| Cholera | Considered for travellers to areas with active outbreaks or limited access to clean water and sanitation, particularly humanitarian or aid workers and those on longer trips |
| Meningitis ACWY | Recommended for travel to parts of the African meningitis belt, and required for pilgrims travelling to Saudi Arabia for Hajj or Umrah |
| Japanese encephalitis | Considered for longer or higher risk stays in relevant parts of Asia, particularly rural areas during transmission season |
| Tick-borne encephalitis | Considered for extended outdoor or forested activity in parts of Central and Eastern Europe and parts of Asia during peak tick season |
| Malaria prevention tablets | Prescription antimalarial tablets matched to your specific itinerary and the resistance patterns in your destination; not a vaccine, but a core part of prevention |
| General pre-travel health review | Particularly useful for long-haul destinations, where the combined effect of a long flight, unfamiliar climate and jet lag can interact with existing health conditions |
This list is not exhaustive and does not confirm eligibility or suitability for any individual traveller. A full risk assessment at your consultation will determine which of the above, if any, are recommended for your specific trip.
Because several of these vaccines need to be given weeks in advance, and some require more than one dose, booking your travel health and jet lag consultation together, well ahead of departure, means nothing gets left until the last minute.
Frequently Asked Questions About Jet Lag
Is jet lag worse on the way there or the way back?
This depends on the direction you are flying relative to home, not simply which leg of the trip you are on. If your outbound flight travels eastward, that leg is generally the harder one to adjust to, and the return westward flight is often easier, or vice versa depending on your route.
Can children get jet lag too?
Yes, children can experience jet lag, and it can sometimes take a different pattern to adults, with more noticeable effects on mood, appetite and behaviour alongside disrupted sleep. Planning ahead is just as worthwhile for family trips as it is for solo or business travel.
Does jet lag get worse with age?
Many people find recovery takes longer as they get older, though this varies significantly between individuals. If you are planning a long-haul trip with older relatives, building in extra recovery time before any demanding activities can make a real difference.
Should I combine my jet lag planning with my vaccine appointment?
Yes, this is generally a sensible approach. A single pre-travel consultation can cover both your personalised jet lag plan and a review of any destination-specific vaccines or antimalarial tablets you may need, saving you time and making sure nothing is overlooked before you fly.
Can jet lag affect my sleep for weeks after I return home?
For most people, symptoms resolve within the general timeframes discussed in the guide above, roughly a day per time zone crossed. However, longer or more disruptive trips, poor sleep habits on the flight, or an existing sleep disorder can occasionally extend how long it takes to feel fully back to normal. If sleep disruption is persisting well beyond what would normally be expected for your route, it is worth discussing this with a clinician rather than assuming it will simply pass.
Is melatonin available over the counter in the UK for jet lag?
Availability and licensing status can vary, and this is exactly the kind of question worth raising at a consultation rather than assuming based on what is available elsewhere. Our team can talk through whether short-term sleep support is appropriate for your specific trip and circumstances.
Does flying business or first class reduce jet lag?
A more comfortable seat can improve sleep quality during the flight, which may help slightly with recovery, but it does not change the fundamental cause of jet lag, which is the mismatch between your internal body clock and your new time zone. Even in the most comfortable cabin, crossing several time zones still requires a period of adjustment.
Is jet lag the same as general travel tiredness or “travel exhaustion”?
Not quite. Jet lag is specifically caused by crossing time zones and relates to your circadian rhythm being out of sync with local time. General travel tiredness can happen on any long journey, including ones without a time zone change, and is more often caused by disrupted sleep, dehydration, or a long, tiring travel day rather than your body clock itself.
How far in advance should I arrive before an important meeting or event to recover from jet lag?
Where possible, building in extra time before anything demanding, such as an important meeting, a big family event, or strenuous physical activity, gives your body a better chance to adjust first. Using the general guide of roughly a day per time zone crossed can help you estimate how much buffer time is realistic for your specific trip.
Is it still worth preparing for jet lag if my trip is very short?
Yes, though your strategy may differ. On very short trips, some travellers choose to stay on home time zone for meals and sleep where practical, rather than attempting a full adjustment that may not be worthwhile for just a day or two away. This is worth discussing at your consultation, since the right approach depends on your specific itinerary and how much of the local schedule you need to keep to.
Plan Ahead for Your Next Long-Haul Trip
Whether you are heading off on a long-awaited holiday or a demanding business trip, a little preparation goes a long way towards reducing how long jet lag affects you, and makes sure your destination vaccines are sorted well before departure.