Sync your body with your destination. Forget jet lag.
Natural methods, science-informed plans, no medication. Light, sleep, meals and caffeine timed to your route.
The Journey
Three phases, one smooth transition.
01
Pre-flight
Shift sleep up to 1 h per day for 3 days before you fly.
02
In-transit
Switch to destination time on board: sleep, light and meals on their clock.
03
Post-flight
Timed light and meals finish the job — 1 h/day east, 1.5 h/day west.
Light Window Chart
Destination daylight with your seek and avoid windows. Drag the scrubber.
General wellness guidance, not medical advice. Consult a health professional for medical conditions. We never recommend melatonin or any medication.
Pricing
Premium
$24.99/yr
- Multi-city & layover planning
- Solar-tracking light windows
- Circadian meal & fasting schedules
- Offline PDF download
- Calendar alerts (Google, Apple, Outlook)
- No ads
- Saved trips
7 days free. Payment method required. Renews automatically after the trial; cancel before it ends to avoid charges. Taxes may apply.
FAQ
What causes jet lag?+
Your internal circadian clock stays on origin time while daylight, meals and social cues follow the destination. Symptoms last until the clock catches up.
Why is flying east harder?+
Going east requires advancing the clock (sleeping earlier), which the body does more slowly — roughly 1 h per day versus 1.5 h per day westbound.
How does light help?+
Light is the strongest signal for the body clock. Light at the right moment shifts it in the direction you need; light at the wrong moment pushes it the wrong way.
Do you recommend melatonin or sleeping pills?+
No. syncjetlag only uses natural levers: light, sleep timing, meals and caffeine. Talk to a doctor about any medication.
What if my trip is shorter than 48 hours?+
It's usually better to stay on your origin schedule. The planner switches to short-stay mode automatically.