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

Distance from Dewey, SD to Sinclair, WY

Distance

305 mi

Time

5 hours 57 mins

Gas Cost

$28 - $55

There are 197.68 miles from Dewey to Sinclair in southwest direction and 305 miles (490.85 kilometers) by car, following the US-85 route.

Dewey and Sinclair are 5 hours 57 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Sinclair, WY.

Dewey, SD and Sinclair, WY are in the same time zone (MDT). Current time in both locations is 4:28 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Sinclair, WY? 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 12.23 gallons of gas to cover the route between Dewey, SD and Sinclair, WY.

The estimated cost of gas to go from Dewey to Sinclair is $39.90.

During the route, an average car will release 239.63 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 Sinclair, WY

If you want to meet halfway between Dewey, SD and Sinclair, WY or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.837312 and -105.873144, or 42º 50' 14.3232" N, 105º 52' 23.3184" W. This location is 152.28 miles away from Dewey, SD and Sinclair, WY and it would take approximately 2 hours 58 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Glenrock, WY, situated 154 miles from Dewey, SD and 152 miles from Sinclair, WY. It would take 3 hours 9 mins to go from Dewey to Glenrock and 2 hours 54 mins to go from Sinclair to Glenrock.