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

Distance from Marathon, ON to Cornwall, ON

Distance

1,189 km

Time

18 hours 18 mins

Gas Cost

$90 - $215

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

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

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

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

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Marathon, ON to Cornwall, ON:

Lowest Price Rental Cars in Marathon, ON

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Marathon »

Gas Consumption and Emissions

A car with a fuel efficiency of 8.9 l/100 km will need 105.79 liters of gas to cover the route between Marathon, ON and Cornwall, ON.

The estimated cost of gas to go from Marathon to Cornwall is $159.75.

During the route, an average car will release 2,530.60 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 Marathon, ON and Cornwall, ON

If you want to meet halfway between Marathon, ON and Cornwall, ON or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.377796 and -81.394188, or 46º 22' 40.0656" N, 81º 23' 39.0768" W. This location is 369.31 miles away from Marathon, ON and Cornwall, 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 418 miles from Marathon, ON and 395 miles from Cornwall, ON. It would take 8 hours 50 mins to go from Marathon to Turbine and 8 hours 49 mins to go from Cornwall to Turbine.

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between Marathon, ON and Cornwall, 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	1,188.70 km	641.85 nautical mi

Road Trip Tips