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

Distance from Williamstown, MO to Agar, SD

Distance

718 mi

Time

13 hours 25 mins

Gas Cost

$67 - $130

There are 527.26 miles from Williamstown to Agar in northwest direction and 718 miles (1,155.51 kilometers) by car, following the I-90 route.

Williamstown and Agar are 13 hours 25 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, MO to Agar, SD. The halfway point is Sergeant Bluff, IA.

Williamstown, MO and Agar, SD are in the same time zone (CDT). Current time in both locations is 7:33 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Williamstown, MO to Agar, SD:

Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Agar, 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 28.82 gallons of gas to cover the route between Williamstown, MO and Agar, SD.

The estimated cost of gas to go from Williamstown to Agar is $94.02.

During the route, an average car will release 564.72 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 Agar, SD

If you want to meet halfway between Williamstown, MO and Agar, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.359245 and -96.318405, or 42º 21' 33.282" N, 96º 19' 6.258" W. This location is 358.86 miles away from Williamstown, MO and Agar, SD and it would take approximately 6 hours 42 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Sergeant Bluff, IA, situated 372 miles from Williamstown, MO and 354 miles from Agar, SD. It would take 6 hours 34 mins to go from Williamstown to Sergeant Bluff and 5 hours 18 mins to go from Agar to Sergeant Bluff.