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飛行時間計算機

座標または距離、巡航速度、地上バッファから推定飛行時間を算出します。

はじめに

Flight Time Calculator — Estimated flight duration from coordinates or distance, cruise speed & ground buffer. Enter Origin latitude, Origin longitude, Destination latitude, Destination longitude, Cruise speed (km/h), Ground buffer (min) to get an instant, accurate result.

計算式

Great-circle distance is found with the Haversine formula (R=6371km mean Earth radius): a = sin²(Δlat/2) + cos(lat1)·cos(lat2)·sin²(Δlon/2), c = 2·atan2(√a, √(1−a)), distance = R·c. Flight time = distance ÷ cruise speed, plus a fixed ground buffer (default 30 min) for taxi/takeoff/climb/descent — this buffer and the default 900 km/h cruise speed are typical estimates, not exact figures for any specific flight.

ステップごとの説明

  1. Enter the Origin latitude.
  2. Enter the Origin longitude.
  3. Enter the Destination latitude.
  4. Enter the Destination longitude.
  5. Enter the Cruise speed (km/h).
  6. Enter the Ground buffer (min).
  7. Click Calculate to see your result instantly.

実例

Example: With Origin latitude = 40.7128, Origin longitude = -74.006, Destination latitude = 34.0522, Destination longitude = -118.2437, Cruise speed (km/h) = 900, Ground buffer (min) = 30, the Flight Time Calculator gives Distance Km: 3935.7463, Flight Hours Air: 4.3731, Total Hours: 4.

よくある質問

Why does the estimate differ from my actual booked flight time?
Real flights add routing around airways and weather, headwinds/tailwinds, and airport taxi/holding delays — this calculator only adds a flat ground buffer to great-circle flying time, so it will be close but not exact.
What cruise speed should I use?
Around 900 km/h (560 mph) is typical for a commercial jet airliner; adjust it lower for propeller aircraft or higher for very fast long-haul jets.
Does this account for time zone changes?
No — the result is flight duration only (time in the air plus ground buffer), not the local clock-time difference between origin and destination.
What inputs does the Flight Time Calculator need?
You'll need to provide: Origin latitude, Origin longitude, Destination latitude, Destination longitude, Cruise speed (km/h), Ground buffer (min). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Flight Time Calculator?
The Flight Time Calculator applies the formula exactly as calculated — Great-circle distance is found with the Haversine formula (R=6371km mean Earth radius): a = sin²(Δlat/2) + cos(lat1)·cos(lat2)·sin²(Δlon/2), c = 2·atan2(√a, √(1−a)), distance = R·c. Flight time = distance ÷ cruise speed, plus a fixed ground buffer (default 30 min) for taxi/takeoff/climb/descent — this buffer and the default 900 km/h cruise speed are typical estimates, not exact figures for any specific flight. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Flight Time Calculator free to use?
Yes, the Flight Time Calculator is completely free, requires no signup, and runs instantly in your browser.

飛行時間計算機について

The Flight Time Calculator uses a real, verifiable formula — Great-circle distance is found with the Haversine formula (R=6371km mean Earth radius): a = sin²(Δlat/2) + cos(lat1)·cos(lat2)·sin²(Δlon/2), c = 2·atan2(√a, √(1−a)), distance = R·c. Flight time = distance ÷ cruise speed, plus a fixed ground buffer (default 30 min) for taxi/takeoff/climb/descent — this buffer and the default 900 km/h cruise speed are typical estimates, not exact figures for any specific flight. — so results are accurate every time, not an approximation.