Flight Distance Calculator

Great-circle distance between two airports in km, miles and nautical miles.

Calculations run locally in your browser; nothing is sent to a server.

Formula and method

Haversine: a = sin²(Δφ/2) + cos φ₁·cos φ₂·sin²(Δλ/2); d = 2R·atan2(√a, √(1−a)), R = 6,371.0088 km.

JFK → LHR: about 5,540 km (3,442 mi, 2,991 NM).