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

Distance from Williamstown, MO to Simpson, IL

Distance

319 mi

Time

6 hours 30 mins

Gas Cost

$30 - $58

There are 251.99 miles from Williamstown to Simpson in southeast direction and 319 miles (513.38 kilometers) by car, following the US-61 route.

Williamstown and Simpson are 6 hours 30 mins far apart, if you drive non-stop .

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

Williamstown, MO and Simpson, IL are in the same time zone (CDT). Current time in both locations is 11:42 am.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Simpson, 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 12.82 gallons of gas to cover the route between Williamstown, MO and Simpson, IL.

The estimated cost of gas to go from Williamstown to Simpson is $41.81.

During the route, an average car will release 251.10 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 Simpson, IL

If you want to meet halfway between Williamstown, MO and Simpson, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.629695 and -90.335912, or 38º 37' 46.902" N, 90º 20' 9.2832" W. This location is 159.56 miles away from Williamstown, MO and Simpson, IL and it would take approximately 3 hours 15 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Richmond Heights, MO, situated 162 miles from Williamstown, MO and 157 miles from Simpson, IL. It would take 3 hours 31 mins to go from Williamstown to Richmond Heights and 2 hours 59 mins to go from Simpson to Richmond Heights.

Major City Closest to Halfway Point

The major city closest to the halfway point between Williamstown, MO and Simpson, IL is Saint Louis, MO, situated 169 miles from Williamstown, MO and 150 miles from Simpson, IL. It would take 3 hours 41 mins to go from Williamstown to Saint Louis and 2 hours 53 mins to go from Simpson to Saint Louis.