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

Distance from Williamstown, MO to Custer, MT

Distance

1,098 mi

Time

20 hours 17 mins

Gas Cost

$102 - $199

There are 889.84 miles from Williamstown to Custer in northwest direction and 1,098 miles (1,767.06 kilometers) by car, following the I-90 route.

Williamstown and Custer are 20 hours 17 mins far apart, if you drive non-stop .

This is the fastest route from Williamstown, MO to Custer, MT.

Please note the time difference between Williamstown, MO and Custer, MT is 1 hour. The current time in Williamstown is 10:40 am and the current time in Custer is 9:40 am.

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Lowest Price Rental Cars in Williamstown, MO

Planning on renting a car to go from Williamstown, MO to Custer, MT? 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 44.10 gallons of gas to cover the route between Williamstown, MO and Custer, MT.

The estimated cost of gas to go from Williamstown to Custer is $143.86.

During the route, an average car will release 864.06 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 Custer, MT

If you want to meet halfway between Williamstown, MO and Custer, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.737773 and -98.915632, or 43º 44' 15.9828" N, 98º 54' 56.2752" W. This location is 549.08 miles away from Williamstown, MO and Custer, MT and it would take approximately 10 hours 8 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Kimball, SD, situated 572 miles from Williamstown, MO and 527 miles from Custer, MT. It would take 10 hours 52 mins to go from Williamstown to Kimball and 9 hours 28 mins to go from Custer to Kimball.