Ancona to Trieste Sea Distance Calculator

Calculate the exact nautical distance from Ancona, Italy to Trieste, Italy. Plan your maritime journey with our professional route calculator.

Distance: 154.3 nm; nautical miles
Under Sail: 31 hours; at 5 knots
Under Power: 15 hours; at 10 knots
Best Time: May-October; 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: 154.3 nautical miles

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

Passage details

This is a moderately indirect coastal passage: the navigable route runs 26% longer than the 123 nm direct line, its heading turning from west-northwest to north-northwest.

Sea distance: 154.3 nm (285.8 km)
Direct line: 122.6 nm26% longer
Great-circle bearing: 4° (north)
Sea area: Adriatic Sea
Geographic extent: 2.0° × 0.7°
Crossing: Domestic · Same region
From: Ancona (Italy) 43.6158, 13.5184
To: Trieste (Italy) 45.6510, 13.7460
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	31 hours
8 kn	19 hours
10 kn	15 hours
12 kn	13 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 Ancona to Trieste Route

Linking Ancona and Trieste, this single-day crossing domestic crossing connecting two major commercial ports sits in the Mediterranean region — a passage shaped by the winter Bora, a cold north-easterly arriving in sudden gusts, and the humid southerly Sirocco.

The lane links Ancona (Italy) and Trieste (Italy), within the same maritime region.

Navigation Tips

•A single-day crossing domestic passage in the Mediterranean region typically requires planning for the winter Bora, a cold north-easterly arriving in sudden gusts, and the humid southerly Sirocco.
•A single-day crossing leg in Mediterranean benefits from waypoint planning and verified fuel availability.
•Confirm operating hours and clearance procedures for this domestic crossing within the same maritime region, since rules vary by port.
•Verify that emergency equipment matches the demands of a single-day crossing leg in Mediterranean.
•Documentation requirements differ for domestic passages within the same maritime region; verify cruising permits in advance.

More Routes from Ancona

Frequently Asked Questions

How far is it from Ancona to Trieste by sea?

Approximately 154.3 nautical miles separate Ancona and Trieste by sea, making this a single-day crossing leg in Mediterranean.

How long does it take to sail from Ancona to Trieste?

Expect about 15 hours – 31 hours for a single-day crossing run of 154.3 nautical miles within the same maritime region.

What's the best time to sail from Ancona to Trieste?

Peak sailing season here is May-October; year-round, Mediterranean routes contend with the winter Bora, a cold north-easterly arriving in sudden gusts, and the humid southerly Sirocco.

Plan Your Perfect Maritime Journey

Use our advanced calculator above to customize your route, add waypoints, calculate fuel costs, and share your journey plan with crew members.

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