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

Distance from Williamstown, MO to Buffalo Gap, SD

Distance

840 mi

Time

15 hours 16 mins

Gas Cost

$78 - $152

There are 632.98 miles from Williamstown to Buffalo Gap in northwest direction and 840 miles (1,351.85 kilometers) by car, following the I-90 route.

Williamstown and Buffalo Gap are 15 hours 16 mins far apart, if you drive non-stop .

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

Please note the time difference between Williamstown, MO and Buffalo Gap, SD is 1 hour. The current time in Williamstown is 10:24 am and the current time in Buffalo Gap is 9:24 am.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Buffalo Gap, 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 33.75 gallons of gas to cover the route between Williamstown, MO and Buffalo Gap, SD.

The estimated cost of gas to go from Williamstown to Buffalo Gap is $110.08.

During the route, an average car will release 661.17 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 Buffalo Gap, SD

If you want to meet halfway between Williamstown, MO and Buffalo Gap, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.3534 and -96.796237, or 43º 21' 12.24" N, 96º 47' 46.4532" W. This location is 420.15 miles away from Williamstown, MO and Buffalo Gap, SD and it would take approximately 7 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 Worthing, SD, situated 441 miles from Williamstown, MO and 403 miles from Buffalo Gap, SD. It would take 8 hours 46 mins to go from Williamstown to Worthing and 6 hours 36 mins to go from Buffalo Gap to Worthing.

Major City Closest to Halfway Point

The major city closest to the halfway point between Williamstown, MO and Buffalo Gap, SD is Sioux Falls, SD, situated 457 miles from Williamstown, MO and 387 miles from Buffalo Gap, SD. It would take 9 hours 5 mins to go from Williamstown to Sioux Falls and 6 hours 23 mins to go from Buffalo Gap to Sioux Falls.