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

Distance from Dewey, SD to Stephan, SD

Distance

315 mi

Time

6 hours 9 mins

Gas Cost

$28 - $55

There are 233.72 miles from Dewey to Stephan in northeast direction and 315 miles (506.94 kilometers) by car, following the I-90 and US-14 route.

Dewey and Stephan are 6 hours 9 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Stephan, SD. The halfway point is Cottonwood, SD.

Please note the time difference between Dewey, SD and Stephan, SD is 1 hour. The current time in Dewey is 4:30 am and the current time in Stephan is 5:30 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Stephan, SD? 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 12.65 gallons of gas to cover the route between Dewey, SD and Stephan, SD.

The estimated cost of gas to go from Dewey to Stephan is $39.66.

During the route, an average car will release 247.84 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 $3.14 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Dewey, SD and Stephan, SD

If you want to meet halfway between Dewey, SD and Stephan, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.839260 and -101.896111, or 43º 50' 21.336" N, 101º 53' 45.9996" W. This location is 157.50 miles away from Dewey, SD and Stephan, SD and it would take approximately 3 hours 4 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Cottonwood, SD, situated 161 miles from Dewey, SD and 160 miles from Stephan, SD. It would take 3 hours 15 mins to go from Dewey to Cottonwood and 2 hours 56 mins to go from Stephan to Cottonwood.