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

Distance from Williamstown, MO to Okaton, SD

Distance

672 mi

Time

12 hours 25 mins

Gas Cost

$63 - $122

There are 529.71 miles from Williamstown to Okaton in northwest direction and 672 miles (1,081.48 kilometers) by car, following the I-90 route.

Williamstown and Okaton are 12 hours 25 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, MO to Okaton, SD.

Williamstown, MO and Okaton, SD are in the same time zone (CDT). Current time in both locations is 9:15 am.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Okaton, SD? 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 27 gallons of gas to cover the route between Williamstown, MO and Okaton, SD.

The estimated cost of gas to go from Williamstown to Okaton is $88.07.

During the route, an average car will release 528.98 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 Okaton, SD

If you want to meet halfway between Williamstown, MO and Okaton, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.114173 and -96.195734, or 42º 6' 51.0228" N, 96º 11' 44.6424" W. This location is 336.15 miles away from Williamstown, MO and Okaton, SD and it would take approximately 6 hours 12 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Whiting, IA, situated 346 miles from Williamstown, MO and 331 miles from Okaton, SD. It would take 7 hours 12 mins to go from Williamstown to Whiting and 5 hours 23 mins to go from Okaton to Whiting.