Distance between cities › USA › South Dakota › Mount Vernon, SD › Distance from Mount Vernon to Acton Book Hotels

Distance from Mount Vernon, SD to Acton, MT

Distance

593 mi

Time

10 hours 17 mins

Gas Cost

$55 - $108

There are 532.79 miles from Mount Vernon to Acton in northwest direction and 593 miles (954.34 kilometers) by car, following the I-90 route.

Mount Vernon and Acton are 10 hours 17 mins far apart, if you drive non-stop .

This is the fastest route from Mount Vernon, SD to Acton, MT. The halfway point is Spearfish Canyon, SD.

Please note the time difference between Mount Vernon, SD and Acton, MT is 1 hour. The current time in Mount Vernon is 8:21 am and the current time in Acton is 7:21 am.

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Lowest Price Rental Cars in Mount Vernon, SD

Planning on renting a car to go from Mount Vernon, SD to Acton, MT? Here there are some offers to rent a car in Mount Vernon, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Mount Vernon »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 23.83 gallons of gas to cover the route between Mount Vernon, SD and Acton, MT.

The estimated cost of gas to go from Mount Vernon to Acton is $77.72.

During the route, an average car will release 466.83 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 Mount Vernon, SD and Acton, MT

If you want to meet halfway between Mount Vernon, SD and Acton, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.528862 and -103.902359, or 44º 31' 43.9032" N, 103º 54' 8.4924" W. This location is 296.65 miles away from Mount Vernon, SD and Acton, MT and it would take approximately 5 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 Spearfish Canyon, SD, situated 309 miles from Mount Vernon, SD and 342 miles from Acton, MT. It would take 4 hours 3 mins to go from Mount Vernon to Spearfish Canyon and 5 hours 24 mins to go from Acton to Spearfish Canyon.