How the distance is calculated
Aircraft fly along (roughly) the shortest path over the curved Earth, the great-circle route. The calculator uses the haversine formula with the airports’ coordinates:
d = 2R × asin( √( sin²(Δφ/2) + cos φ1 × cos φ2 × sin²(Δλ/2) ) )
R = 6,371 km (mean Earth radius), φ = latitude, λ = longitude
How flight time is estimated
Flight time ≈ distance ÷ cruise speed + about 30 minutes (taxi, climb and descent)
Real schedules differ because of air routes that avoid restricted airspace, winds (eastbound flights are often faster with jet-stream tailwinds), and airport congestion. Airline “block times” also include time at the gate.
Why it matters
- Passenger rights: in India, compensation for some cancellations depends on the flight’s block time.
- Frequent-flyer miles and some fares are based on distance.
- Carbon footprint estimates start from distance flown.
Questions people ask
Why is the actual flight longer than this distance?
Planes follow published air routes and avoid some airspace, so the flown distance is usually a few percent longer than the great-circle distance.
Is the time zone included?
The result shows the flying time. Local arrival time also depends on time zones — the table lists the approximate difference from longitude.
Which airports are included?
All Indian airports with scheduled flights, plus major airports worldwide and medium airports in nearby countries, from the public-domain OurAirports data.
Sources
Results are estimates to help you plan. Always confirm important numbers with the seller, carrier or authority concerned. Last reviewed: November 2026.