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

Distance from Cornwall, ON to Marathon, ON

Distance

1,189 km

Time

18 hours 18 mins

Gas Cost

$90 - $215

There are 975.10 km (605.90 miles) from Cornwall to Marathon in northwest direction and 1,189.31 km (739 miles) by car, following the 17 route.

Cornwall and Marathon are 18 hours 18 mins far apart, if you drive non-stop .

This is the fastest route from Cornwall, ON to Marathon, ON. The halfway point is Turbine, ON.

Cornwall, ON and Marathon, ON are in the same time zone (EDT). Current time in both locations is 9:05 am.

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Lowest Price Rental Cars in Cornwall, ON

Planning on renting a car to go from Cornwall, ON to Marathon, ON? 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 105.85 liters of gas to cover the route between Cornwall, ON and Marathon, ON.

The estimated cost of gas to go from Cornwall to Marathon is $159.83.

During the route, an average car will release 2,531.85 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 3, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Cornwall, ON and Marathon, ON

If you want to meet halfway between Cornwall, ON and Marathon, ON or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.377979 and -81.392807, or 46º 22' 40.7244" N, 81º 23' 34.1052" W. This location is 369.49 miles away from Cornwall, ON and Marathon, ON and it would take approximately 9 hours 9 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Turbine, ON, situated 396 miles from Cornwall, ON and 418 miles from Marathon, ON. It would take 7 hours 23 mins to go from Cornwall to Turbine and 8 hours 5 mins to go from Marathon to Turbine.

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between Cornwall, ON and Marathon, ON in this table:

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	605.90 mi	975.10 km	526.51 nautical mi
Driving distance	739 mi	1,189.29 km	642.16 nautical mi

Road Trip Tips