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

Distance from Saint Thomas, ON to Cornwall, ON

Distance

624 km

Time

7 hours 43 mins

Gas Cost

$47 - $113

There are 573.80 km (356.54 miles) from Saint Thomas to Cornwall in northeast direction and 624.43 km (388 miles) by car, following the 401 route.

Saint Thomas and Cornwall are 7 hours 43 mins far apart, if you drive non-stop .

This is the fastest route from Saint Thomas, ON to Cornwall, ON. The halfway point is Grafton, ON.

Saint Thomas, ON and Cornwall, ON are in the same time zone (EDT). Current time in both locations is 3:26 pm.

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Lowest Price Rental Cars in Saint Thomas, ON

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Saint Thomas »

Gas Consumption and Emissions

A car with a fuel efficiency of 8.9 l/100 km will need 55.55 liters of gas to cover the route between Saint Thomas, ON and Cornwall, ON.

The estimated cost of gas to go from Saint Thomas to Cornwall is $83.89.

During the route, an average car will release 1,328.87 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 Saint Thomas, ON and Cornwall, ON

If you want to meet halfway between Saint Thomas, 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 43.998604 and -78.076836, or 43º 59' 54.9744" N, 78º 4' 36.6096" W. This location is 193.93 miles away from Saint Thomas, ON and Cornwall, ON and it would take approximately 3 hours 51 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Grafton, ON, situated 201 miles from Saint Thomas, ON and 191 miles from Cornwall, ON. It would take 3 hours 22 mins to go from Saint Thomas to Grafton and 3 hours 11 mins to go from Cornwall to Grafton.

Distance conversions

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

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	356.54 mi	573.80 km	309.83 nautical mi
Driving distance	388 mi	624.21 km	337.05 nautical mi

Road Trip Tips