Distance between cities › USA › South Dakota › Custer, SD › Distance from Custer to Mount Sterling Book Hotels

Distance from Custer, SD to Mount Sterling, WI

Distance

721 mi

Time

12 hours 44 mins

Gas Cost

$67 - $131

There are 634.73 miles from Custer to Mount Sterling in east direction and 721 miles (1,160.34 kilometers) by car, following the I-90 and US-14 route.

Custer and Mount Sterling are 12 hours 44 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Mount Sterling, WI. The halfway point is Montrose, SD.

Please note the time difference between Custer, SD and Mount Sterling, WI is 1 hour. The current time in Custer is 2:55 am and the current time in Mount Sterling is 3:55 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Mount Sterling, WI? Here there are some offers to rent a car in Custer, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Custer »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 28.97 gallons of gas to cover the route between Custer, SD and Mount Sterling, WI.

The estimated cost of gas to go from Custer to Mount Sterling is $94.51.

During the route, an average car will release 567.64 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 Custer, SD and Mount Sterling, WI

If you want to meet halfway between Custer, SD and Mount Sterling, WI or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.667202 and -97.141335, or 43º 40' 1.9272" N, 97º 8' 28.806" W. This location is 360.71 miles away from Custer, SD and Mount Sterling, WI and it would take approximately 6 hours 22 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Montrose, SD, situated 360 miles from Custer, SD and 367 miles from Mount Sterling, WI. It would take 5 hours 1 min to go from Custer to Montrose and 5 hours 37 mins to go from Mount Sterling to Montrose.

Major City Closest to Halfway Point

The major city closest to the halfway point between Custer, SD and Mount Sterling, WI is Sioux Falls, SD, situated 387 miles from Custer, SD and 344 miles from Mount Sterling, WI. It would take 5 hours 21 mins to go from Custer to and 5 hours 17 mins to go from Mount Sterling to Sioux Falls.