Montreal to Buffalo Sea Distance Calculator

Calculate the exact nautical distance from Montreal, Canada to Buffalo, United States. Plan your maritime journey with our professional route calculator.

Distance
322.5 nm
nautical miles
Under Sail
2.7 days
at 5 knots
Under Power
32 hours
at 10 knots
Best Time
Varies by area
Typical Sailing Season

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

Interactive Route Map

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Distance: 322.5 nautical miles
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This map shows the direct sea route from Montreal to Buffalo. 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 16% longer than the 278 nm direct line, its heading turning from east-northeast to north-northeast. It is an international crossing between two countries.

Sea distance
322.5 nm (597.3 km)
Direct line
277.5 nm16% longer
Great-circle bearing
237° (west-southwest)
Geographic extent
2.7° × 5.6°
Crossing
Cross-border · Same region
From
Montreal (Canada) 45.5017, -73.5673
To
Buffalo (United States) 42.8833, -78.8833
Route basis
Sea-lane route
Passage timeEstimated passage time by cruising speed
Cruising speedDuration
5 kn2.7 days
8 kn40 hours
10 kn32 hours
12 kn27 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 Montreal to Buffalo Route

Linking Montreal and Buffalo, this multi-day coastal international crossing connecting two major commercial ports sits in the North America region — a passage shaped by tropical storm and hurricane activity from roughly June through November in the affected coastal waters.

The lane links Montreal (Canada) and Buffalo (United States), within the same maritime region.

Navigation Tips

  • •A multi-day coastal international passage in the North America region typically requires planning for tropical storm and hurricane activity from roughly June through November in the affected coastal waters.
  • •A multi-day coastal leg in North America benefits from waypoint planning and verified fuel availability.
  • •Confirm operating hours and clearance procedures for this international crossing within the same maritime region, since rules vary by port.
  • •Verify that emergency equipment matches the demands of a multi-day coastal leg in North America.
  • •Documentation requirements differ for international passages within the same maritime region; verify cruising permits in advance.

Frequently Asked Questions

How far is it from Montreal to Buffalo by sea?

Approximately 322.5 nautical miles separate Montreal and Buffalo by sea, making this a multi-day coastal leg in North America.

How long does it take to sail from Montreal to Buffalo?

Expect about 1.3 days – 2.7 days for a multi-day coastal run of 322.5 nautical miles within the same maritime region.

What's the best time to sail from Montreal to Buffalo?

Conditions on this route vary by area and season, so there is no single best time that applies along its whole length. Always check current weather forecasts and sea conditions before departure.

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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