Distance between cities › Canada › Ontario › Cornwall, ON › Distance from Cornwall to Blacks Harbour Book Hotels

Distance from Cornwall, ON to Blacks Harbour, NB

Distance

789 km

Time

11 hours 8 mins

Gas Cost

$60 - $143

There are 624.04 km (387.76 miles) from Cornwall to Blacks Harbour in east direction and 788.58 km (490 miles) by car, following the I-395 and ME 9 and ME 15 route.

Cornwall and Blacks Harbour are 11 hours 8 mins far apart, if you drive non-stop .

This is the fastest route from Cornwall, ON to Blacks Harbour, NB. The halfway point is Marston, QC.

Please note the time difference between Cornwall, ON and Blacks Harbour, NB is 1 hour. The current time in Cornwall is 9:09 pm and the current time in Blacks Harbour is 10:09 pm.

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Lowest Price Rental Cars in Cornwall, ON

Planning on renting a car to go from Cornwall, ON to Blacks Harbour, NB? Here there are some offers to rent a car in Cornwall, ON

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Cornwall »

Gas Consumption and Emissions

A car with a fuel efficiency of 8.9 l/100 km will need 70.19 liters of gas to cover the route between Cornwall, ON and Blacks Harbour, NB.

The estimated cost of gas to go from Cornwall to Blacks Harbour is $105.98.

During the route, an average car will release 1,678.90 kilograms of CO₂ to the atmosphere. The carbon footprint would be 2.13 kilograms of CO₂ per kilometer.

Average Canada gas price used for calculation is $1.51 per liter of regular gas. Price last updated on March 4, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Cornwall, ON and Blacks Harbour, NB

If you want to meet halfway between Cornwall, ON and Blacks Harbour, NB or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.276913 and -70.569366, or 45º 16' 36.8868" N, 70º 34' 9.7176" W. This location is 245.02 miles away from Cornwall, ON and Blacks Harbour, NB and it would take approximately 5 hours 34 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Marston, QC, situated 215 miles from Cornwall, ON and 285 miles from Blacks Harbour, NB. It would take 4 hours 24 mins to go from Cornwall to Marston and 5 hours 52 mins to go from Blacks Harbour to Marston.

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between Cornwall, ON and Blacks Harbour, NB in this table:

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	387.76 mi	624.04 km	336.95 nautical mi
Driving distance	490 mi	788.63 km	425.83 nautical mi

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