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

Distance from Radiant, ON to Cornwall, ON

Distance

382 km

Time

5 hours 27 mins

Gas Cost

$29 - $69

There are 295.92 km (183.88 miles) from Radiant to Cornwall in southeast direction and 381.41 km (237 miles) by car, following the 17 route.

Radiant and Cornwall are 5 hours 27 mins far apart, if you drive non-stop .

This is the fastest route from Radiant, ON to Cornwall, ON. The halfway point is Renfrew, ON.

Radiant, ON and Cornwall, ON are in the same time zone (EDT). Current time in both locations is 7:47 am.

Any questions or tips to share?

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

Lowest Price Rental Cars in Radiant, ON

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Radiant »

Gas Consumption and Emissions

A car with a fuel efficiency of 8.9 l/100 km will need 33.96 liters of gas to cover the route between Radiant, ON and Cornwall, ON.

The estimated cost of gas to go from Radiant to Cornwall is $51.28.

During the route, an average car will release 812.29 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 Radiant, ON and Cornwall, ON

If you want to meet halfway between Radiant, 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 45.447437 and -76.598213, or 45º 26' 50.7732" N, 76º 35' 53.5668" W. This location is 118.54 miles away from Radiant, ON and Cornwall, ON and it would take approximately 2 hours 43 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Renfrew, ON, situated 119 miles from Radiant, ON and 121 miles from Cornwall, ON. It would take 3 hours 20 mins to go from Radiant to Renfrew and 2 hours 10 mins to go from Cornwall to Renfrew.

Distance conversions

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

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	183.88 mi	295.92 km	159.78 nautical mi
Driving distance	237 mi	381.56 km	206.03 nautical mi

Road Trip Tips