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Flight route and distance calculator
Choose an origin and destination airport. The calculator draws the great-circle route, measures the distance and estimates the flight time at a speed you choose.
This is a geometric calculation. It does not mean that an airline operates a flight on this route, and real flight times depend on aircraft, winds and air-traffic routing.
How the calculation works
The distance uses the Haversine formula with a mean Earth radius of 6,371.0088 km. Flight time = distance ÷ cruise speed + allowance. The default 850 km/h is a typical jet cruise ground speed in still air; the 30-minute allowance covers taxi, climb and descent. Time difference uses each airport’s IANA time zone, including daylight saving time on today’s date.