This calculator uses latitude and longitude to estimate great-circle distance with the Haversine formula, then divides that distance by an average speed to produce a simplified flight time estimate. It also shows an approximate longitude based time zone difference and an interactive route map.
Type the latitude and longitude of the departure location, such as an airport or city reference point.
Type the latitude and longitude of the destination. The page will automatically update the estimated distance.
Select miles or kilometers, then enter an average speed. A commercial jet style default is prefilled for convenience.
Press Calculate to see estimated flight time, time zone difference, the route map, scenario compare, and the PDF export layout.
The calculator estimates the duration of a flight between two coordinates by first calculating great-circle distance and then dividing that distance by the average speed you provide. It is intended for educational use, quick planning, and simple route comparisons rather than official scheduling.
The underlying distance calculation uses the Haversine formula. This formula estimates the shortest distance over the Earth's surface between two latitude and longitude points, commonly called the great-circle distance.
The standard form is:
This page uses an Earth radius of about 3,959 miles internally, then converts to kilometers when needed.
The time zone difference shown here is a simplified estimate based on longitude. Every 15 degrees of longitude corresponds to about one hour. This is useful as a rough planning shortcut, but actual civil time zones are influenced by national borders, local policy, and daylight saving time.
Because of these factors, airline block times are usually different from a simple great-circle estimate.
Wikipedia: Flight time | Wikipedia: Haversine formula | OpenStreetMap
No. It estimates distance with the Haversine formula and displays a simple straight route line between the two coordinate pairs on the map.
Actual flights can be shorter or longer because of wind, operational routing, taxi time, climb, descent, and delays.
This page uses a longitude based estimate of roughly one hour for every 15 degrees of longitude difference.
Yes. Switch the distance unit to kilometers and enter the average speed in kph.
These results are for general reference only and may differ from airline schedules, operational routes, or actual travel time.
