Flight Time Calculator
Estimate gate-to-gate flight duration between any two airports. Based on great-circle distance with realistic speed assumptions.
Popular flight times
London→Istanbul3h 26m–4h 01mLondon→New York6h 39m–7h 35mParis→Istanbul3h 06m–3h 40mParis→New York6h 59m–7h 57mFrankfurt→New York7h 23m–8h 23mFrankfurt→Newark7h 24m–8h 24mMunich→Newark7h 44m–8h 46mMunich→Los Angeles11h 11m–12h 34mAmsterdam→Istanbul3h 04m–3h 38mAmsterdam→Newark7h 01m–7h 59mMadrid→Los Angeles10h 56m–12h 17mMadrid→Chicago8h 00m–9h 03mBarcelona→Los Angeles11h 15m–12h 38mBarcelona→Chicago8h 23m–9h 29mRome→Chicago9h 06m–10h 16mRome→Atlanta9h 29m–10h 42mMilan→Atlanta8h 59m–10h 09mMilan→Dallas9h 59m–11h 15m
How flight time is estimated
We calculate the great-circle distance between airports using the Haversine formula, then convert it to an estimated gate-to-gate time using cruise speed heuristics for different distance categories, plus overhead for taxi, takeoff, and approach. See our detailed guide.
Best use cases for this tool
- Trip planning before you choose flights (rough travel-day time budgeting)
- Comparing long-haul options and connection feasibility
- Estimating true travel-day impact before meetings or events
- Sanity-checking route length and expected duration by region
When estimates can differ most
- Strong seasonal winds (especially transatlantic and transpacific)
- Airline-specific routing and ATC constraints
- Heavy congestion at major hub airports
- Aircraft type and block-time padding
When to verify elsewhere
Use your airline's schedule for booking and exact departure/arrival timing. JetLag Planner is most useful for planning and comparison before booking or when evaluating route impact.
Transparency and quality
We publish our assumptions and limitations so you can assess confidence in each estimate. Read our methodology and editorial policy.