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

Distance from Custer, SD to Ashton, SD

Distance

366 mi

Time

6 hours 42 mins

Gas Cost

$32 - $63

There are 265.76 miles from Custer to Ashton in northeast direction and 366 miles (589.02 kilometers) by car, following the I-90 and US-14 route.

Custer and Ashton are 6 hours 42 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Ashton, SD. The halfway point is Draper, SD.

Please note the time difference between Custer, SD and Ashton, SD is 1 hour. The current time in Custer is 7:06 pm and the current time in Ashton is 8:06 pm.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Ashton, SD? 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 14.69 gallons of gas to cover the route between Custer, SD and Ashton, SD.

The estimated cost of gas to go from Custer to Ashton is $45.51.

During the route, an average car will release 287.90 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 $3.10 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Custer, SD and Ashton, SD

If you want to meet halfway between Custer, SD and Ashton, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.909382 and -100.524231, or 43º 54' 33.7752" N, 100º 31' 27.2316" W. This location is 182.95 miles away from Custer, SD and Ashton, SD and it would take approximately 3 hours 21 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Draper, SD, situated 186 miles from Custer, SD and 203 miles from Ashton, SD. It would take 2 hours 48 mins to go from Custer to Draper and 3 hours 37 mins to go from Ashton to Draper.