Flight Time Calculator

How is Flight Time Calculated?

This calculator estimates flight durations by determining the Great Circle Distance between two airports and dividing it by an average commercial jet cruising speed. We add a standard 30-minute buffer to each leg of the journey to account for taxiing, takeoff, and landing procedures.

What is Great Circle Distance?

Because the Earth is a sphere, the shortest distance between two points is not a straight line on a flat map, but an arc along the surface known as a Great Circle. This is why flight paths on maps often look curved, especially on long-haul transoceanic flights. We use the Haversine formula to calculate this spherical distance accurately.

The Impact of Wind Patterns

Flight times are rarely symmetric. Prevailing high-altitude winds, known as Jet Streams, blow predominantly from West to East. Therefore, flying Eastward (e.g., New York to London) usually benefits from a tailwind, making the flight faster. Conversely, flying Westward (e.g., London to New York) involves battling a headwind, increasing the flight time. When enabled, this tool applies a basic heuristic to adjust flight speeds based on the calculated bearing between the airports.