A practical guide to beating jet lag and restoring your sleep

It doesn’t matter whether you’re travelling for business, on vacation, or to a medical conference, crossing multiple time zones often triggers jet lag. Characterized by fatigue, insomnia, daytime sleepiness, brain fog, and digestive upset, jet lag happens when rapid travel disrupts your internal biological clock. Understanding why this happens and using a few targeted strategies, you can recover faster and make the most of your trip.

The physiology of circadian disruption

Circadian regulation centers on a small group of nerve cells in the brain’s hypothalamus called the suprachiasmatic nucleus (SCN). The SCN acts as the body’s master clock, directing daily cycles of hormone secretion, core body temperature, digestion, and sleep-wake patterns.

When flying across several time zones, your environment changes abruptly, but your internal clock stays set to your home time zone. Sunlight, mealtimes, and local cues conflict with the signals your brain receives, leading to temporary circadian desynchronization. According to the Sleep Foundation, data shows that people find traveling eastward often find jet lag to be worse, possibly because advancing your sleep schedule requires more effort than delaying it.

4 practical steps to reset your body clock

While your body naturally adapts to a new time zone at a rate of roughly one to one-and-a-half hours per day, you can accelerate this process with a few deliberate habits.

1. Harness light exposure

Light is the single most powerful signal for shifting your circadian rhythm. Exposure to bright light early in the morning helps advance your internal clock (ideal when traveling east), while evening light exposure delays it (better when traveling west).

• Traveling east: Seek bright sunlight in the morning at your destination, and limit light exposure in the late afternoon and evening.

• Traveling west: Seek evening sunlight and avoid bright morning light to help stay awake longer.

  
  

2. Adjust your schedule in advance

Gradually shifting your bedtime and mealtimes a few days before departure makes the transition far easier. Shifting your sleep schedule by just 30 to 60 minutes a night toward your destination's time zone reduces the shock to your system upon arrival. For a step-by-step breakdown of how to prepare your schedule before take-off, refer to Skyscanner’s Jet Lag Guide.

3. Practice strategic hydration and nutrition

High altitudes inside aircraft cabins cause rapid dehydration, which worsens symptoms like headaches, fatigue, and muscle soreness. Drink plenty of water before, during, and after your flight, while limiting alcohol and excess caffeine, which disrupt sleep and worsen dehydration.

Also, align your mealtimes with your destination’s local hours as soon as you board the plane. Digestion plays a major role in regulating peripheral body clocks in organs like the liver and gut, making consistent meal timing an important anchor for recovery.

4. Optimize sleep on arrival

When you arrive at your destination, resist the urge to take long afternoon naps. If you need to rest, limit naps to 20 or 30 minutes in the early afternoon so you don’t compromise your ability to sleep at night. Keep your hotel room dark, quiet, and cool, ideally between 60°F and 67°F (15°C–19°C), to encourage restorative deep sleep.

If you travel often or experience persistent travel-related sleep disruptions, reviewing public health guidelines from the Centers for Disease Control and Prevention (CDC) can provide additional support on sleep hygiene and managing travel fatigue safely.

Jet lag is a natural response to rapid travel across time zones, but it doesn’t have to ruin your itinerary. By controlling your light exposure, staying hydrated, and aligning your meals and sleep schedule with your destination, you can quickly reset your body clock and enjoy a restful, productive trip. This is a sponsored article not reviewed by our medical review team.