Flight Time Calculator

This works out how long a flight takes between two points on the earth. Enter the latitude and longitude of each end in decimal degrees, a cruising speed in knots, miles per hour or kilometres per hour, and a flat allowance for taxi, climb and descent, and it returns the great circle distance in miles, kilometres and nautical miles, the time in the air, the block time and the initial heading. There is no airport database behind it, so the coordinates are yours to supply and nothing is guessed from a three letter code. The distance is a haversine great circle on a sphere, and a real flight follows airways, dodges weather and fights or rides the wind, so treat the answer as the shortest possible case rather than a schedule.