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

Distance from Williamstown, MO to Armour, SD

Distance

514 mi

Time

10 hours 28 mins

Gas Cost

$48 - $93

There are 398.67 miles from Williamstown to Armour in northwest direction and 514 miles (827.20 kilometers) by car, following the I-29 route.

Williamstown and Armour are 10 hours 28 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, MO to Armour, SD. The halfway point is Marne, IA.

Williamstown, MO and Armour, SD are in the same time zone (CDT). Current time in both locations is 4:08 pm.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Armour, 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 20.64 gallons of gas to cover the route between Williamstown, MO and Armour, SD.

The estimated cost of gas to go from Williamstown to Armour is $67.32.

During the route, an average car will release 404.32 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 Armour, SD

If you want to meet halfway between Williamstown, MO and Armour, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.494457 and -95.108719, or 41º 29' 40.0452" N, 95º 6' 31.3884" W. This location is 256.93 miles away from Williamstown, MO and Armour, SD and it would take approximately 5 hours 14 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Marne, IA, situated 265 miles from Williamstown, MO and 262 miles from Armour, SD. It would take 5 hours 5 mins to go from Williamstown to Marne and 4 hours 26 mins to go from Armour to Marne.