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

Distance from Dewey, SD to Alsea, OR

Distance

1,334 mi

Time

1 day

Gas Cost

$124 - $242

There are 972.14 miles from Dewey to Alsea in west direction and 1,334 miles (2,146.86 kilometers) by car, following the I-90 route.

Dewey and Alsea are 1 day far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Alsea, OR. The halfway point is Clinton, MT.

Please note the time difference between Dewey, SD and Alsea, OR is 1 hour. The current time in Dewey is 6:15 am and the current time in Alsea is 5:15 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Alsea, OR? 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 53.57 gallons of gas to cover the route between Dewey, SD and Alsea, OR.

The estimated cost of gas to go from Dewey to Alsea is $174.74.

During the route, an average car will release 1,049.48 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 Alsea, OR

If you want to meet halfway between Dewey, SD and Alsea, OR or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.723320 and -113.509224, or 46º 43' 23.952" N, 113º 30' 33.2064" W. This location is 666.91 miles away from Dewey, SD and Alsea, OR and it would take approximately 12 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 Clinton, MT, situated 694 miles from Dewey, SD and 661 miles from Alsea, OR. It would take 10 hours 21 mins to go from Dewey to Clinton and 10 hours 21 mins to go from Alsea to Clinton.