Sea distance from Houston to Lisboa
The sea route from Houston (United States) to Lisboa (Portugal) is about 4,578 nautical miles, which is 8,478 km or 5,268 statute miles. That is about 10% 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) | 38d 4h |
| Sailboat, average (6 kn) | 31d 19h |
| Displacement trawler (8 kn) | 23d 20h |
| Fast trawler (10 kn) | 19d 2h |
| Planing motor yacht (15 kn) | 12d 17h |
| Fast motor yacht (20 kn) | 9d 13h |
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 Houston to Lisboa 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 Lisboa from Houston by sea?
About 4,578 nautical miles (8,478 km / 5,268 statute miles) along the practical sea route. The straight-line distance is shorter, but boats follow coastlines, channels, and traffic lanes.
How long does it take to sail from Houston to Lisboa?
At a typical sailing average of 6 knots it is about 31d 19h underway. A 10-knot trawler needs about 19d 2h, and a 20-knot motor yacht about 9d 13h. 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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