How to Beat Jet Lag: A Science-Based Plan That Actually Works

Jet lag isn't a mystery — it's your body clock stuck in the wrong time zone. And because it's biology, it has rules you can use. This is the plan sleep researchers actually recommend, distilled for real travellers.

Start shifting before you fly

Three days before departure, move your sleep 1 hour per day toward your destination's time. Flying east: earlier nights. Flying west: later. Even a partial shift pays off massively on arrival.

Set your watch at takeoff

The moment you board, your brain lives in destination time. Eat when they eat, sleep when they sleep — or at least pretend convincingly with an eye mask and earplugs.

Light is the master switch

Your body clock takes its orders from light. Flying east: get bright light in the destination morning, avoid evening light. Flying west: the opposite. Two hours of well-timed daylight beats any supplement.

The flight rules

Hydrate constantly (cabin air is desert-dry), skip the alcohol nightcap (it destroys sleep quality), avoid caffeine within 8 hours of your target bedtime, and walk the aisle every couple of hours.

Melatonin: small doses, right timing

0.5–3 mg at your destination's bedtime for the first 2–3 nights helps shift the clock — more is not better. It's a signal, not a sleeping pill.

Arrival day: the golden rule

Stay awake until at least 9 p.m. local time. The 2 p.m. 'just one hour' nap is where jet lag wins. Push through with daylight, a walk, and an early dinner instead.

Give it the honest number of days

Expect roughly one day of adjustment per time zone crossed, less if you follow the plan. A 6-hour jump without preparation is a rough week; with it, a mildly sleepy two days.

The Bottom Line

Shift before you fly, chase the right light, protect arrival day. Do those three things and jet lag goes from trip-ruiner to minor inconvenience.