Flight Duration Calculator

Enter your departure city or airport and destination city or airport, then select your aircraft type and average cruising speed to get an estimated flight duration. The Flight Duration Calculator uses great circle distance to compute total flight time, distance in kilometers and miles, and a rough CO₂ emissions estimate — all without needing real-time data.

Enter the latitude of your departure city or airport.

Enter the longitude of your departure city or airport.

Enter the latitude of your destination city or airport.

Enter the longitude of your destination city or airport.

km/h

Only used when 'Custom Speed' is selected above.

hrs

Add any expected layover time at connecting airports.

Results

Total Flight Duration

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Flight Time (Hours & Minutes)

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Great Circle Distance

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Distance in Miles

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Cruising Speed Used

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Estimated CO₂ Emissions

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Flight Time Breakdown

Frequently Asked Questions

How is flight duration calculated?

Flight duration is estimated by dividing the great circle distance between two coordinates by the average cruising speed of the selected aircraft. The great circle distance is the shortest path between two points on a sphere, which is the route commercial aircraft typically follow. Layover time, if entered, is added on top of the airborne duration.

What is great circle distance and why does it matter for flight time?

Great circle distance is the shortest distance between two points on the surface of a sphere. Aircraft fly great circle routes because they represent the most fuel-efficient and time-saving path across the globe. This calculator uses the Haversine formula to compute this distance from the latitude and longitude of your departure and destination points.

How accurate is this flight time estimate?

The estimate provides a solid approximation based on straight-line distance and typical cruising speeds. Actual flight times can vary due to air traffic control routing, wind patterns (jet streams), altitude changes, taxiing time, and individual airline schedules. Always check your airline's posted flight time for the most precise information.

What average speeds are used for each aircraft type?

The calculator uses the following approximate cruising speeds: Commercial Airliner — 900 km/h, Wide-Body Jet — 950 km/h, Regional Jet — 750 km/h, Turboprop — 550 km/h, and Private Jet — 800 km/h. You can also enter a custom speed for more specialized aircraft.

How is CO₂ emissions per passenger estimated?

The CO₂ estimate uses a commonly cited average emissions factor of approximately 0.115 kg of CO₂ per passenger per kilometer flown. This is a rough industry average and can vary significantly based on the aircraft model, load factor, seat class, and airline efficiency standards.

Does this calculator account for stopovers or connecting flights?

Yes — you can enter a layover or stopover duration in hours in the 'Layover Time' field. This time is added to the total flying time to give you a full trip duration estimate. Note that the airborne flight time and distance are still calculated based on the direct route between your two coordinates.

Where can I find the latitude and longitude for a city or airport?

You can find coordinates by searching for your airport or city on Google Maps and right-clicking the location to copy the coordinates. Airport coordinates are also widely available on sites like the FAA database, OurAirports.com, or by searching '[airport name] coordinates' in any search engine.

How do I calculate round-trip flight duration?

Select 'Round-Trip' in the Trip Type field. The calculator will double the one-way flight duration and add any layover time twice to give you the total estimated round-trip travel time. The distance shown is still the one-way great circle distance for reference.

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