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

Distance from Dewey, SD to Agar, SD

Distance

321 mi

Time

6 hours 12 mins

Gas Cost

$28 - $55

There are 216.24 miles from Dewey to Agar in northeast direction and 321 miles (516.60 kilometers) by car, following the I-90 and US-14 route.

Dewey and Agar are 6 hours 12 mins far apart, if you drive non-stop .

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

Please note the time difference between Dewey, SD and Agar, SD is 1 hour. The current time in Dewey is 12:15 am and the current time in Agar is 1:15 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Agar, 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 12.88 gallons of gas to cover the route between Dewey, SD and Agar, SD.

The estimated cost of gas to go from Dewey to Agar is $39.88.

During the route, an average car will release 252.27 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 Dewey, SD and Agar, SD

If you want to meet halfway between Dewey, SD and Agar, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.850502 and -101.921753, or 43º 51' 1.8072" N, 101º 55' 18.3108" W. This location is 160.31 miles away from Dewey, SD and Agar, SD and it would take approximately 3 hours 6 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 173 miles from Agar, SD. It would take 3 hours 15 mins to go from Dewey to Cottonwood and 3 hours 16 mins to go from Agar to Cottonwood.