Miami to Key West Sea Distance Calculator

Calculate the exact nautical distance from Miami, United States to Key West, United States. Plan your maritime journey with our professional route calculator.

Distance: 186.8 nm; nautical miles
Under Sail: 37 hours; at 5 knots
Under Power: 19 hours; at 10 knots
Best Time: December-April; Typical Sailing Season

Distance follows a sea-lane route. Sailing times are estimates at fixed cruising speeds and vary with vessel, weather, and currents.

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Distance: 186.8 nautical miles

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This map shows the direct sea route from Miami to Key West. The actual sailing path may vary based on weather conditions and navigation requirements.

Passage details

This is a markedly indirect inter-island route: the navigable route runs 65% longer than the 113 nm direct line, its heading turning from east to east-northeast.

Sea distance: 186.8 nm (346 km)
Direct line: 113.1 nm65% longer
Great-circle bearing: 230° (southwest)
Sea area: Caribbean Sea
Geographic extent: 1.2° × 1.9°
Crossing: Domestic · Same region
From: Miami (United States) 25.7743, -80.1937
To: Key West (United States) 24.5551, -81.7800
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	37 hours
8 kn	23 hours
10 kn	19 hours
12 kn	16 hours

Distance follows a sea-lane route generated from marine traffic lanes; passage times are computed at fixed cruising speeds.

Read the methodology — How we calculate sea distances

Last reviewed 2026-06-17

About Miami to Key West Route

Linking Miami and Key West, this single-day crossing within one country crossing linking the mainland to an island anchorage sits in the Caribbean region — a passage shaped by persistent easterly trade winds and lee-shore swells.

The lane links Miami (United States) and Key West (United States), between neighbouring ports of the same region.

Navigation Tips

•A single-day crossing within one country passage in the Caribbean region typically requires planning for persistent easterly trade winds and lee-shore swells.
•A single-day crossing leg in Caribbean benefits from waypoint planning and verified fuel availability.
•Confirm operating hours and clearance procedures for this within one country crossing between neighbouring ports of the same region, since rules vary by port.
•Verify that emergency equipment matches the demands of a single-day crossing leg in Caribbean.
•Documentation requirements differ for within one country passages between neighbouring ports of the same region; verify cruising permits in advance.