Sea distance from Lisboa to Sydney
The sea route from Lisboa (Portugal) to Sydney (Australia) is about 10,561 nautical miles, which is 19,559 km or 12,154 statute miles. The route transits Strait of Gibraltar and Suez Canal and Bab-el-Mandeb. That is about 8% longer than the direct great-circle line, because the practical route follows coastlines and shipping lanes.
Voyage time by boat speed
Time underway is distance divided by speed. These are continuous-passage figures with no stops or weather margin.
| Boat and speed | Time underway |
|---|---|
| Sailboat, conservative (5 kn) | 88d 0h |
| Sailboat, average (6 kn) | 73d 8h |
| Displacement trawler (8 kn) | 55d 0h |
| Fast trawler (10 kn) | 44d 0h |
| Planing motor yacht (15 kn) | 29d 8h |
| Fast motor yacht (20 kn) | 22d 0h |
Planning estimate, not navigation
This distance is computed over the open Eurostat shipping-lane network. It is a realistic passage length for planning, but your sailed distance will differ with weather routing, currents, draft, and the exact berths you leave from and arrive at. Always verify against official charts.
Building with these numbers? The sea route & distance API returns this figure, voyage time, and route geometry for any port pair in one GET request.
Plan this passage properly
Open Lisboa to Sydney in the Marine OS route planner: it suggests the sea route, then you drag waypoints, set your speed and fuel burn, and check weather and tides along the way.
Open this route in the plannerFrequently asked questions
How far is Sydney from Lisboa by sea?
About 10,561 nautical miles (19,559 km / 12,154 statute miles) along the practical sea route, which transits Strait of Gibraltar and Suez Canal and Bab-el-Mandeb. The straight-line distance is shorter, but boats follow coastlines, channels, and traffic lanes.
How long does it take to sail from Lisboa to Sydney?
At a typical sailing average of 6 knots it is about 73d 8h underway. A 10-knot trawler needs about 44d 0h, and a 20-knot motor yacht about 22d 0h. Add margin for weather, currents, and stops.
How is this distance calculated?
It is computed over the open Eurostat global shipping-lane network, the same kind of network freight routing tools use. It is a realistic planning estimate, not a navigation product: your sailed distance will vary with weather routing, draft, and the exact harbors you use.
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