Free Aviation Tool
Flight Time & Distance Calculator
Calculate the great-circle distance and estimated flight time between any two airports worldwide. Supports knots, KM, and nautical miles.
✈ Flight Calculator
Distance & Time Estimator
Simple 3 steps
How It Works
No sign-up required. Results are instant and calculated using the Haversine formula.
Enter Airports
Type any city name or IATA code in the From and To fields
Choose Speed
Enter your aircraft's cruise speed in knots or pick a preset
Get Results
Instantly see distance in KM & NM, flight time, and compass bearing
Quick reference
Popular Routes
Common routes calculated at 450 knots (narrow-body jet)
| Route | Cities | Distance (KM) | Nautical Miles | Flight Time | Bearing |
|---|---|---|---|---|---|
| KHI → DXB | Karachi – Dubai | 1,188 km | 642 NM | 1h 26m | 274° W |
| KHI → ISB | Karachi – Islamabad | 1,046 km | 565 NM | 1h 15m | 351° N |
| ISB → LHR | Islamabad – London | 6,012 km | 3,246 NM | 7h 13m | 310° NW |
| DXB → LHR | Dubai – London | 5,481 km | 2,960 NM | 6h 34m | 317° NW |
| LHR → JFK | London – New York | 5,541 km | 2,992 NM | 6h 39m | 288° WNW |
| SYD → LAX | Sydney – Los Angeles | 12,070 km | 6,518 NM | 14h 29m | 54° NE |
About this tool
Accurate & Free
This flight distance and time calculator uses the Haversine formula to compute the great-circle distance — the shortest path between two points on the surface of the Earth. It accounts for the curvature of the Earth, giving you the most accurate straight-line flight distance possible.
Results are ideal for flight planning estimates, aviation students, and anyone curious about how far apart two airports are. Simply enter your origin, destination, and cruise speed to get instant results.
- 100+ airports across 6 continents
- Distance in both KM and Nautical Miles
- Flight time in decimal hours and h:mm format
- Compass bearing with cardinal direction
- Aircraft speed presets built in
- Instant swap origin & destination
- Works on mobile and desktop
- No sign-up or account needed
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