Distance between cities › USA › Missouri › Williamstown, MO › Distance from Williamstown to Lerna Book Hotels

Distance from Williamstown, MO to Lerna, IL

Distance

247 mi

Time

5 hours 16 mins

Gas Cost

$23 - $45

There are 194.66 miles from Williamstown to Lerna in southeast direction and 247 miles (397.51 kilometers) by car, following the I-72 and US-36 route.

Williamstown and Lerna are 5 hours 16 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, MO to Lerna, IL.

Williamstown, MO and Lerna, IL are in the same time zone (CDT). Current time in both locations is 10:11 am.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Lerna, IL? Here there are some offers to rent a car in Williamstown, MO

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 MPG will need 9.91 gallons of gas to cover the route between Williamstown, MO and Lerna, IL.

The estimated cost of gas to go from Williamstown to Lerna is $32.33.

During the route, an average car will release 194.21 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Williamstown, MO and Lerna, IL

If you want to meet halfway between Williamstown, MO and Lerna, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 39.728638 and -90.162092, or 39º 43' 43.0968" N, 90º 9' 43.5312" W. This location is 123.41 miles away from Williamstown, MO and Lerna, IL and it would take approximately 2 hours 38 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Arnold, IL, situated 126 miles from Williamstown, MO and 121 miles from Lerna, IL. It would take 2 hours 39 mins to go from Williamstown to Arnold and 2 hours 41 mins to go from Lerna to Arnold.

Major City Closest to Halfway Point

The major city closest to the halfway point between Williamstown, MO and Lerna, IL is Springfield, IL, situated 156 miles from Williamstown, MO and 93 miles from Lerna, IL. It would take 3 hours 13 mins to go from Williamstown to Springfield and 2 hours 12 mins to go from Lerna to Springfield.