How to reduce jet lag

You cannot eliminate jet lag entirely, but you can reduce it significantly with timing discipline. Light timing is the dominant lever, then sleep timing, then caffeine, then supplements.

The hierarchy

What actually matters, ranked by circadian impact:

  1. Light timing: the dominant signal for shifting your clock. Get it when your phase needs it, avoid it when mistimed.
  2. Sleep timing: only works if aligned with your circadian phase, not just when you feel tired.
  3. Caffeine timing: keep it to the first half of your local day.
  4. Supplements: secondary to the above. Melatonin can help on larger shifts when timed correctly.

Before flight

  • Set your destination bedtime target before you leave.
  • Plan your in-flight sleep window based on arrival time and route direction.
  • Pack light management tools if needed: sunglasses for blocking mistimed light, eye mask for sleep timing.

During flight

Follow a deliberate sleep strategy instead of random sleep chunks:

  • Full sleep (4-6 hours): for morning arrivals when you need arrival-day function.
  • Controlled sleep (3-5 hours early in flight): for evening arrivals to protect bedtime.
  • Power nap (20-30 minutes): when you need alertness but must keep sleep pressure high.
  • Stay awake: viable on westbound routes and shorter trips when timed correctly.

Use the flight to shift toward destination rhythm, not just to pass time.

After landing

Priority order for post-arrival adaptation:

  1. Light first: get local daylight when your phase needs it, avoid bright light when mistimed. Wrong-timed light can push your clock the wrong way.
  2. Sleep timing second: protect first local night above all else. A solid first night speeds adaptation by days.
  3. Meals third: local meal timing helps but is weaker than light and sleep.

Avoid improvising. Mixed signals delay recovery.

Common mistakes

  • Landing at 18:00, planning to sleep at 22:00, but taking a 2 hour nap at 19:00. That kills sleep pressure.
  • Using bright light at the wrong local time and assuming sleep alone will fix it.
  • Sleeping whenever tired without considering destination phase alignment.
  • Trying to fix everything with one massive sleep-in on day one while ignoring light timing.
  • Random sleep chunks on the plane instead of a deliberate sleep window.

Recovery timeline

Rough adaptation windows based on timezone shift:

  • 1-3 zones: 1-2 days typical
  • 4-6 zones: 3-5 days typical
  • 7+ zones: 5-7+ days typical

Eastbound routes often add 20-30% to these windows. First local night quality is the best predictor—if you get 6+ hours solid sleep that first night, recovery is usually 30-40% faster.

Get your route-specific plan · Eastbound vs westbound · Red-eye strategy

Research and Further Reading

This site gives general circadian-informed travel guidance. It is not medical advice.