Great-circle distance in km, miles and nautical miles plus bearing between two c...

{ "method": "GET", "queryParams": { "from": "London", "fromCountry": "GB", "to": "Paris", "toCountry": "FR" }, "type": "http" }

{ "example": { "asOf": "2026-10-21T06:28:04.582Z", "attribution": "City data: GeoNames (geonames.org), licensed CC BY 4.0, cities15000 snapshot 2026-10-21. Crowd-edited; populations and coordinates may be dated.", "degraded": false, "direction": "SSE", "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "distanceKm": 343.8, "distanceMiles": 213.6, "distanceNauticalMiles": 185.6, "from": { "admin1Code": "ENG", "admin1Name": "England", "asciiName": "London", "country": "GB", "countryName": "United Kingdom", "elevationM": 25, "geonameId": 2643743, "lat": 51.50853, "lon": -0.12574, "name": "London", "population": 8961989, "role": "national capital", "timezone": "Europe/London" }, "initialBearingDeg": 148, "notChecked": [ "road, rail or flight route distance (straight line over a spherical Earth)", "the exact point inside each city (GeoNames uses one representative coordinate)", "…1 more" ], "reasons": [ "Great-circle distance on a sphere of radius 6371.0088 km; real routes are longer." ], "source": "GeoNames cities15000 (CC BY 4.0)", "summary": "London, GB to Paris, FR: 344 km (214 mi), initial bearing 148 degrees SSE.", "to": { "admin1Code": "11", "admin1Name": "Ile-de-France", "asciiName": "Paris", "country": "FR", "countryName": "France", "elevationM": 42, "geonameId": 2988507, "lat": 48.85341, "lon": 2.3488, "name": "Paris", "population": 2138551, "role": "national capital", "timezone": "Europe/Paris" }, "verdict": "COMPUTED" }, "type": "json" }