Jet lag isn't just tiredness — it's your body's internal clock (circadian rhythm) being out of sync with the local time at your destination. The good news: there's solid research on how to minimise it, and most of it doesn't require pills or gadgets.
Why Jet Lag Happens
Your body has an internal clock, regulated primarily by light exposure, that controls when you feel sleepy, alert, and hungry. This clock adjusts slowly — roughly one time zone per day for most people. Cross six time zones and your body needs nearly a week to fully adjust naturally.
Jet lag tends to be worse travelling eastward than westward, because eastward travel requires you to fall asleep earlier than your body wants to — a harder adjustment than staying awake later.
Before You Fly
Start Shifting Your Schedule
For trips of 5+ time zones, begin adjusting your sleep schedule 2–3 days before departure. If you're travelling east, go to bed and wake up an hour earlier each day. Travelling west, do the opposite. Even a partial pre-adjustment reduces the shock on arrival.
Choose Flight Times Strategically
Where possible, pick flights that arrive in the early evening at your destination — this lets you have a light meal, stay awake a few hours, and go to bed at a reasonable local time, helping you anchor to the new schedule immediately.
During the Flight
Set Your Watch Immediately
As soon as you board, change your watch (and phone) to destination time. Start thinking in terms of the new time zone — eat and sleep according to it as much as the flight schedule allows.
Manage Light Exposure
Light is the single strongest signal for your circadian clock. If you're travelling east and need to sleep earlier than your body wants, use an eye mask and avoid screens during the "new night" portion of the flight. If travelling west and need to stay awake longer, keep the window shade up and avoid sleeping during "new day" hours.
Stay Hydrated, Limit Alcohol and Caffeine
Cabin air is dry, and dehydration amplifies fatigue and grogginess. Alcohol disrupts sleep quality even when it helps you fall asleep faster. Caffeine late in the destination's evening will compound the adjustment problem.
On Arrival
Get Outside, Especially in the Morning
Morning light exposure at your destination is one of the most powerful tools for resetting your circadian clock. A 20–30 minute walk outside on your first morning helps signal to your body that this is the new "day."
Eat on the New Schedule
Meal timing is a secondary signal for your body clock. Eating breakfast, lunch, and dinner at the local times — even if you're not very hungry — reinforces the adjustment.
Resist the Nap (Mostly)
A short nap (20–30 minutes) in the early afternoon can help if you're genuinely struggling, but longer naps or napping late in the day will delay your adjustment further. If you must nap, set an alarm.
Consider Melatonin — With Caveats
Melatonin, taken in small doses (0.5–3mg) about 30 minutes before your target bedtime at the destination, has reasonable evidence behind it for reducing jet lag, particularly for eastward travel. It's not a sedative — it's a signal to your body that it's "night." Speak to a pharmacist or doctor before using it, especially if you're on other medications.
Special Considerations for Short Trips
If you're travelling somewhere for less than 2–3 days, some experts suggest not bothering to adjust at all — staying on your home time zone's eating and sleeping schedule as much as practical, since you'll be readjusting again almost immediately. This works better for trips with flexible schedules than for business trips with fixed meeting times.
The Bottom Line
There's no way to eliminate jet lag entirely on long-haul flights across many time zones, but light exposure, meal timing, and a pre-flight schedule shift can meaningfully reduce its severity and duration — often by half or more.
The best way to reduce jet lag's impact is arriving with a plan — and the best way to afford more trips is catching the right flight deal. AirHuntr tracks airline promotions across long-haul routes.
