Distance between cities › USA › South Dakota › Dewey, SD › Distance from Dewey to Simla Book Hotels

Distance from Dewey, SD to Simla, CO

Distance

432 mi

Time

7 hours 45 mins

Gas Cost

$40 - $78

There are 303.27 miles from Dewey to Simla in south direction and 432 miles (695.24 kilometers) by car, following the I-25 route.

Dewey and Simla are 7 hours 45 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Simla, CO.

Dewey, SD and Simla, CO are in the same time zone (MDT). Current time in both locations is 10:17 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Simla, CO? Here there are some offers to rent a car in Dewey, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Dewey »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 17.37 gallons of gas to cover the route between Dewey, SD and Simla, CO.

The estimated cost of gas to go from Dewey to Simla is $56.65.

During the route, an average car will release 340.26 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 Dewey, SD and Simla, CO

If you want to meet halfway between Dewey, SD and Simla, CO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.353471 and -104.868743, or 41º 21' 12.4956" N, 104º 52' 7.4748" W. This location is 216.22 miles away from Dewey, SD and Simla, CO and it would take approximately 3 hours 52 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest city to the halfway point is Cheyenne, WY, situated 231 miles from Dewey, SD and 203 miles from Simla, CO. It would take 4 hours 16 mins to go from Dewey to Cheyenne and 3 hours 32 mins to go from Simla to Cheyenne.