JetLagPlanner

Flight time, time zones & jet lag — planned

Estimate flight duration, compare local times, and get a personalized jet lag adjustment plan. Free, fast, no sign-up.

Travel tools, simplified

Flight Time Calculator

Great-circle distance estimates with realistic gate-to-gate ranges. No guesswork.

Time Zone Converter

Compare local times with DST awareness. Find overlapping hours for meetings.

Jet Lag Planner

Evidence-aligned sleep and light guidance for your route. Adjust faster.

Popular routes

Flight times, time differences, and jet lag plans for top international routes.

London→Istanbul
3h 26m–4h 01m
London→New York
6h 39m–7h 35m
Paris→Istanbul
3h 06m–3h 40m
Paris→New York
6h 59m–7h 57m
Frankfurt→New York
7h 23m–8h 23m
Frankfurt→Newark
7h 24m–8h 24m
Munich→Newark
7h 44m–8h 46m
Munich→Los Angeles
11h 11m–12h 34m
Amsterdam→Istanbul
3h 04m–3h 38m
Amsterdam→Newark
7h 01m–7h 59m
Madrid→Los Angeles
10h 56m–12h 17m
Madrid→Chicago
8h 00m–9h 03m

How we estimate

Flight times are calculated from great-circle distance (Haversine formula) between airport coordinates, then converted to gate-to-gate estimates using cruise speed heuristics for short, medium, and long-haul flights, plus a fixed overhead for taxi, takeoff, climb, descent, and approach.

Time differences use IANA time zone data with DST awareness via the browser's built-in Intl API. Jet lag plans follow evidence-aligned heuristics: gradual sleep shifting, timed light exposure, and caffeine management.

All estimates are approximate. Actual flight times vary by airline, aircraft type, routing, and weather. Jet lag guidance is general wellness information — not medical advice. See our full disclaimer.