Great Circle Distance Calculator
Flight distance between airports in statute miles, nautical miles and kilometres. Add airports in order; paste a route like ATL SFO ATL to add them all.
Use two fingers to move or zoom the map, or open it full screen.
Examples
- Atlanta to New York JFK
- Round trip New York JFK to Frankfurt
- Atlanta to San Francisco, returning San Jose to Atlanta
About great circle distance
The great circle distance is the shortest path between two points over the surface of the earth, the line a long flight follows before winds and airways bend it. Airlines use it to award distance-based miles. Distances here use the haversine formula with a mean earth radius of 3,958.8 statute miles (3,440.065 nautical miles, 6,371.0088 km). Each leg is rounded to a whole number, and totals add up the rounded legs. Airports are matched by their 3-letter IATA or 4-letter ICAO code; type a city in the search box if you are not sure of one.