This Common Pre-Holiday Mistake Could Make Your Jet Lag Much Worse as a Sleep Expert Reveals the Simple Fix Every Traveller Should Know Before Flying

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This common pre-holiday mistake could make your jet lag much worse, and a sleep expert reveals why millions of travellers unknowingly increase their fatigue before flying. However, simple adjustments before departure can reduce exhaustion, improve sleep, and help you enjoy your holiday from the moment you land instead of wasting valuable time recovering.

This common pre-holiday mistake could make your jet lag much worse, according to a sleep expert who says many travellers unknowingly disrupt their body clock before boarding a flight. Instead of waiting until arrival to tackle exhaustion, experts recommend preparing your sleep schedule several days in advance. Moreover, smart decisions during the journey and immediately after landing can significantly reduce fatigue, improve alertness and help your body adapt to a new time zone faster. Consequently, travellers who follow proven sleep strategies are more likely to enjoy their holiday from day one rather than spending precious days battling tiredness, poor concentration and disrupted sleep.

International travel opens the door to unforgettable holidays, business opportunities and cultural experiences. Yet one familiar challenge continues to frustrate travellers crossing multiple time zones—jet lag. While most people expect to feel tired after a long-haul flight, many unknowingly make one critical mistake before departure that significantly worsens the problem.

According to sleep experts, failing to prepare your body clock before travelling is among the biggest reasons travellers struggle with exhaustion after landing. Instead of allowing the body to gradually adapt to a new time zone, maintaining a normal sleep routine until departure forces the circadian rhythm into an abrupt shift, making recovery longer and more difficult.

Health experts estimate that jet lag affects a large proportion of long-haul passengers, particularly those travelling across several time zones. Symptoms commonly include daytime fatigue, insomnia, poor concentration, digestive discomfort, irritability and reduced physical performance. Fortunately, travel specialists and sleep experts agree that a combination of preparation, hydration, movement and strategic sleep can dramatically reduce its effects.

Why Is Changing Your Sleep Schedule Before Flying So Important?

One of the simplest yet most overlooked strategies is gradually adjusting your sleep schedule before travelling.

Instead of waiting until boarding day, travellers heading east should begin going to bed and waking earlier several days before departure. Those travelling west should gradually shift their bedtime later.

Even changing sleep by one or two hours each day helps the body’s internal clock begin adapting before take-off. Rather than forcing an immediate transition after arrival, this gradual adjustment reduces the shock to the body’s natural rhythm and allows travellers to settle into local time more comfortably.

Experts say this single preparation step often determines whether travellers spend the first days of their holiday exploring their destination or recovering in their hotel room.

Staying Active During Long Flights Supports Better Recovery

Although sleeping is important when timed correctly, movement remains equally essential throughout long-haul journeys.

Walking around the cabin every hour helps improve circulation, reduces stiffness and lowers the risk of blood clots during extended flights.

Remaining active also helps travellers stay awake when flying during daytime hours to match the destination’s daylight schedule.

Simple stretching exercises, ankle rotations and regular movement support both physical comfort and overall wellbeing throughout the journey.

Natural Light Plays a Bigger Role Than Many Travellers Realise

Exposure to daylight is one of the strongest regulators of the body’s circadian rhythm.

After arriving at a destination during daylight hours, experts recommend spending time outdoors rather than remaining inside hotels or airport terminals.

Natural sunlight sends powerful signals that help reset the body’s biological clock, encouraging alertness during the day and improving sleep later at night.

Conversely, excessive exposure to artificial lighting, televisions, smartphones and tablets before bedtime can delay sleep by confusing the body’s natural production of melatonin.

Reducing screen time and dimming indoor lights before bed creates better conditions for restful sleep during the first few nights abroad.

Strategic Naps Can Help Without Disrupting Sleep

Many travellers feel overwhelming fatigue after landing, particularly following overnight flights.

Rather than sleeping for several hours immediately upon arrival, sleep specialists recommend limiting naps to approximately 20–45 minutes.

Short power naps provide valuable recovery while avoiding deep sleep cycles that can interfere with bedtime later that evening.

Timing also matters.

Experts advise avoiding naps within eight hours of bedtime to prevent difficulty falling asleep during the local night.

Hydration Matters More Than Coffee or Cocktails

Cabin air is extremely dry, increasing the likelihood of dehydration during flights.

Meanwhile, both caffeine and alcohol contribute further to fluid loss while also affecting sleep quality.

Alcohol frequently fragments sleep, causing passengers to wake repeatedly throughout the night despite initially feeling sleepy.

Caffeine, meanwhile, blocks adenosine—the natural chemical responsible for building sleep pressure throughout the day. Drinking coffee late in the day may therefore delay sleep at the destination.

Experts recommend drinking plenty of water before, during and after flights while limiting alcohol and carefully timing caffeine intake according to the destination’s local time.

Could Melatonin Help Reduce Jet Lag?

Melatonin is the body’s naturally produced sleep hormone and plays a central role in regulating circadian rhythms.

Because international travel disrupts normal melatonin release, supplements may help certain travellers adjust more quickly.

In the UK, melatonin requires a prescription, while in some countries including the United States it is available over the counter.

Medical professionals recommend discussing melatonin with a GP before travelling, particularly for people taking other medications or managing existing health conditions, since interactions and side effects are possible.

Keep Your Holiday Schedule Flexible During the First Two Days

Many travellers make another common mistake by filling their first day abroad with sightseeing, excursions and demanding activities.

Instead, travel experts recommend easing into the destination.

Gentle activities allow the body additional time to recover while still making the most of the holiday.

Suitable first-day options include:

• Relaxing beside the pool
• Visiting a nearby beach
• Exploring local cafés
• Walking through nearby towns
• Enjoying hotel wellness facilities
• Taking short sightseeing trips

Building flexibility into the first 48 hours often results in a more enjoyable holiday overall.

Why Jet Lag Remains a Major Challenge for Global Travellers

As international travel continues to recover and long-haul routes expand, jet lag remains one of the most common travel-related health concerns affecting leisure and business travellers alike.

Whether flying for holidays, conferences or family visits, travellers increasingly recognise that preparation begins long before arriving at the airport.

Rather than relying solely on recovery after landing, adjusting sleep schedules, staying hydrated, moving regularly, managing light exposure and planning sensible itineraries all contribute to a smoother travel experience.

With millions expected to continue travelling internationally throughout the year, sleep experts say preventing jet lag is less about finding a miracle cure and more about making smarter decisions before, during and immediately after every flight.

The primary cause of severe jet lag is a sudden disruption to the body’s internal circadian rhythm after crossing multiple time zones without preparation. The answer lies in gradually adjusting sleep schedules before departure, exposing yourself to natural daylight after arrival, staying hydrated, moving during flights and avoiding excessive alcohol or poorly timed caffeine. The reason these strategies work is because they help the body’s biological clock adapt more naturally instead of forcing an abrupt transition. By following these evidence-based habits, travellers can reduce fatigue, improve sleep quality, remain more alert and begin enjoying their destination almost immediately after landing.With this in mind, Ashley Hainsworth, sleep expert and founder of Bed Kingdom, has shared his top tips for minimising the effects of jet lag, allowing you to make the most of your time abroad. 

Jet lag may be an unavoidable consequence of long-haul travel, but suffering through several days of exhaustion certainly does not have to be. Sleep experts continue to emphasise that preparation is the most effective defence against disrupted sleep and persistent fatigue after crossing time zones. Small changes made before departure—such as gradually adjusting bedtime, planning sleep around destination time, staying hydrated, moving regularly during flights and making smart choices about light exposure—can collectively produce significant improvements.

Travellers often focus heavily on packing luggage, booking excursions and organising transport while overlooking their body’s readiness for international travel. Yet preparing the body’s internal clock can be just as valuable as preparing passports and travel documents. Equally important is maintaining realistic expectations after arrival. Rather than scheduling demanding itineraries immediately, allowing time for gentle activities and proper rest helps maximise both health and enjoyment.

Scientific understanding of circadian rhythms continues to reinforce that consistent sleep habits, appropriate daylight exposure and strategic timing of rest remain among the most effective methods for reducing jet lag naturally. While supplements such as melatonin may benefit some travellers under medical guidance, healthy sleep practices remain the foundation of successful adjustment.

Ultimately, every international journey begins long before boarding the aircraft. Travellers who prepare their bodies as carefully as they prepare their travel plans are far more likely to arrive refreshed, alert and ready to experience every moment of their destination. A few thoughtful changes before departure can transform the first days of any holiday from recovery time into memorable travel experiences.