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

Distance from Custer, SD to Merton, WI

Distance

864 mi

Time

15 hours 3 mins

Gas Cost

$80 - $157

There are 767.07 miles from Custer to Merton in east direction and 864 miles (1,390.47 kilometers) by car, following the I-90 and US-14 route.

Custer and Merton are 15 hours 3 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Merton, WI. The halfway point is Rushmore, MN.

Please note the time difference between Custer, SD and Merton, WI is 1 hour. The current time in Custer is 2:51 am and the current time in Merton is 3:51 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Merton, 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 34.68 gallons of gas to cover the route between Custer, SD and Merton, WI.

The estimated cost of gas to go from Custer to Merton is $113.14.

During the route, an average car will release 679.53 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 Merton, WI

If you want to meet halfway between Custer, SD and Merton, WI or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.627319 and -95.819756, or 43º 37' 38.3484" N, 95º 49' 11.1216" W. This location is 431.82 miles away from Custer, SD and Merton, WI and it would take approximately 7 hours 31 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Rushmore, MN, situated 431 miles from Custer, SD and 437 miles from Merton, WI. It would take 5 hours 58 mins to go from Custer to Rushmore and 6 hours 29 mins to go from Merton to Rushmore.