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

Distance from Cornwall, ON to Marmora, ON

Distance

296 km

Time

3 hours 50 mins

Gas Cost

$22 - $54

There are 240.64 km (149.53 miles) from Cornwall to Marmora in southwest direction and 296.12 km (184 miles) by car, following the 401 route.

Cornwall and Marmora are 3 hours 50 mins far apart, if you drive non-stop .

This is the fastest route from Cornwall, ON to Marmora, ON. The halfway point is Gananoque, ON.

Cornwall, ON and Marmora, ON are in the same time zone (EDT). Current time in both locations is 6:13 am.

Any questions or tips to share?

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

Lowest Price Rental Cars in Cornwall, ON

Planning on renting a car to go from Cornwall, ON to Marmora, 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 26.37 liters of gas to cover the route between Cornwall, ON and Marmora, ON.

The estimated cost of gas to go from Cornwall to Marmora is $39.81.

During the route, an average car will release 630.67 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 Marmora, ON

If you want to meet halfway between Cornwall, ON and Marmora, ON or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.334320 and -76.216591, or 44º 20' 3.552" N, 76º 12' 59.7276" W. This location is 92.04 miles away from Cornwall, ON and Marmora, ON and it would take approximately 1 hour 55 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Gananoque, ON, situated 94 miles from Cornwall, ON and 99 miles from Marmora, ON. It would take 1 hour 36 mins to go from Cornwall to Gananoque and 1 hour 49 mins to go from Marmora to Gananoque.

Major City Closest to Halfway Point

The major city closest to the halfway point between Cornwall, ON and Marmora, ON is Kingston, ON, situated 114 miles from Cornwall, ON and 83 miles from Marmora, ON. It would take 1 hour 57 mins to go from Cornwall to and 1 hour 35 mins to go from Marmora to Kingston.

Distance conversions

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

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	149.53 mi	240.64 km	129.94 nautical mi
Driving distance	184 mi	296.25 km	159.96 nautical mi

Road Trip Tips