I kept getting wrecked by jet lag flying around SE Asia and got tired of doing the math in my head every trip. So I built a calculator that actually tells you what to do. Pick your origin and destination airports, choose when you're landing, and it gives you: - Estimated recovery time (eastward travel is harder. the math is different) - Whether you're traveling east or west and why it matters - Personalized tips for light exposure, sleep timing, and meals based on your specific arrival time

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Hey PH! I run DepartureMap, a small site for exploring direct flight routes. I built this because of a pattern I noticed after two years of bouncing around Asia: the same flight can feel completely different depending on direction and when you land. Bangkok to Tokyo (1h timezone difference) is nothing, but London to Bangkok (6h east) wrecked me every single time.I started doing the math on paper before each trip — timezones, direction, arrival time, when to get sunlight, when to avoid it. After doing it for the 20th time I just turned it into a tool. A few things I learned the hard way that the calculator bakes in: - Going east is genuinely harder than west (your body clock runs slightly longer than 24h, so staying up late is easier than sleeping early) - Landing at 6am vs 11pm in a new timezone makes a huge difference in recovery - Low-dose melatonin (0.5mg, not the 5mg pills) at destination bedtime for 3-4 nights is a cheat code for eastward travel Would love to hear if the recovery estimates match your experience — or if there are tips I should add. Happy to answer any questions!

Intercom — Startups get 90% off Intercom + 1 year of Fin AI Agent free

Startups get 90% off Intercom + 1 year of Fin AI Agent free

Jet Lag Calulator

Calculate your jet lag recovery time for any flight

Calculate your jet lag recovery time for any flight