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

Distance from Williamstown, MO to Flat River, MO

Distance

219 mi

Time

4 hours 38 mins

Gas Cost

$19 - $38

There are 178.88 miles from Williamstown to Flat River in southeast direction and 219 miles (352.45 kilometers) by car, following the US-61 route.

Williamstown and Flat River are 4 hours 38 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, MO to Flat River, MO. The halfway point is Silex, MO.

Williamstown, MO and Flat River, MO are in the same time zone (CDT). Current time in both locations is 7:32 am.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Flat River, MO? 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 8.81 gallons of gas to cover the route between Williamstown, MO and Flat River, MO.

The estimated cost of gas to go from Williamstown to Flat River is $27.20.

During the route, an average car will release 172.53 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 $3.09 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Williamstown, MO and Flat River, MO

If you want to meet halfway between Williamstown, MO and Flat River, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 39.068722 and -90.967827, or 39º 4' 7.3992" N, 90º 58' 4.1772" W. This location is 109.64 miles away from Williamstown, MO and Flat River, MO and it would take approximately 2 hours 19 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Silex, MO, situated 107 miles from Williamstown, MO and 120 miles from Flat River, MO. It would take 2 hours 10 mins to go from Williamstown to Silex and 2 hours 3 mins to go from Flat River to Silex.