Flight tools
Flight distance & time
Pick a departure and a destination — add up to two stops — and we'll calculate the distance, flight time and CO₂ for the whole route.
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How the calculator works
- 1
Choose your airports
Search by city, airport name or IATA code to set a departure and a destination.
- 2
Add stops if you connect
Insert up to two intermediate airports to measure a connecting journey, not just a direct hop.
- 3
See distance, time and CO₂
Get the great-circle distance in kilometres and miles, an estimated flight time and a per-passenger CO₂ figure for the whole route.
Popular routes
Jump straight to the distance and flight time for some of the world's busiest air routes.
Good to know
Flight distance & time FAQ
How is the flight distance calculated?
We use the great-circle distance — the shortest path between two airports across the curved surface of the Earth, measured from their coordinates. It is close to the line a long-haul flight actually follows.
How accurate is the estimated flight time?
Flight time is an estimate for typical cruising conditions. Real journeys vary with aircraft type, headwinds, air-traffic routing and time spent taxiing, so treat it as a close approximation rather than a timetable.
How is the CO₂ estimate worked out?
The CO₂ figure is a per-passenger estimate based on the route distance. Actual emissions depend on the aircraft, how full the flight is and the cabin class you travel in.
Can I calculate a route with connections?
Yes — add up to two stops and the calculator totals the distance, flight time and CO₂ across every leg, so a connecting itinerary is measured from start to finish.
Why doesn't the flight distance match a straight line on a map?
A flat map stretches long distances. The great-circle route curves across the globe and is shorter than the straight line a flat map draws — which is why flights between distant cities arc toward the poles.