Distance between cities › Canada › Ontario › Williamstown, ON › Distance from Williamstown to L'Assomption Book Hotels

Distance from Williamstown, ON to L'Assomption, QC

Distance

136 km

Time

1 hour 51 mins

Gas Cost

$10 - $25

There are 118.51 km (73.64 miles) from Williamstown to L'Assomption in northeast direction and 136.79 km (85 miles) by car, following the 40 route.

Williamstown and L'Assomption are 1 hour 51 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, ON to L'Assomption, QC. The halfway point is Senneville, QC.

Williamstown, ON and L'Assomption, QC are in the same time zone (EDT). Current time in both locations is 5:21 pm.

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Lowest Price Rental Cars in Williamstown, ON

Planning on renting a car to go from Williamstown, ON to L'Assomption, QC? Here there are some offers to rent a car in Williamstown, ON

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Williamstown »

Gas Consumption and Emissions

A car with a fuel efficiency of 8.9 l/100 km will need 12.14 liters of gas to cover the route between Williamstown, ON and L'Assomption, QC.

The estimated cost of gas to go from Williamstown to L'Assomption is $18.34.

During the route, an average car will release 290.47 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 Williamstown, ON and L'Assomption, QC

If you want to meet halfway between Williamstown, ON and L'Assomption, QC or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.421822 and -73.926666, or 45º 25' 18.5592" N, 73º 55' 35.9976" W. This location is 42.39 miles away from Williamstown, ON and L'Assomption, QC and it would take approximately 55 minutes to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Senneville, QC, situated 39 miles from Williamstown, ON and 45 miles from L'Assomption, QC. It would take 46 minutes to go from Williamstown to Senneville and 52 minutes to go from L'Assomption to Senneville.

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between Williamstown, ON and L'Assomption, QC in this table:

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	73.64 mi	118.51 km	63.99 nautical mi
Driving distance	85 mi	136.44 km	73.67 nautical mi

Road Trip Tips