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

Distance from Custer, SD to Millston, WI

Distance

723 mi

Time

12 hours 38 mins

Gas Cost

$67 - $131

There are 643.93 miles from Custer to Millston in east direction and 723 miles (1,163.56 kilometers) by car, following the I-90 and US-14 route.

Custer and Millston are 12 hours 38 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Millston, WI. The halfway point is Hartford, SD.

Please note the time difference between Custer, SD and Millston, WI is 1 hour. The current time in Custer is 2:46 am and the current time in Millston is 3:46 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Millston, 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 29.05 gallons of gas to cover the route between Custer, SD and Millston, WI.

The estimated cost of gas to go from Custer to Millston is $94.76.

During the route, an average car will release 569.14 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 Millston, WI

If you want to meet halfway between Custer, SD and Millston, WI or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.610737 and -96.960548, or 43º 36' 38.6532" N, 96º 57' 37.9728" W. This location is 361.67 miles away from Custer, SD and Millston, WI and it would take approximately 6 hours 19 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Hartford, SD, situated 372 miles from Custer, SD and 366 miles from Millston, WI. It would take 5 hours 8 mins to go from Custer to Hartford and 5 hours 20 mins to go from Millston to Hartford.

Major City Closest to Halfway Point

The major city closest to the halfway point between Custer, SD and Millston, WI is Sioux Falls, SD, situated 387 miles from Custer, SD and 357 miles from Millston, WI. It would take 5 hours 21 mins to go from Custer to and 5 hours 14 mins to go from Millston to Sioux Falls.