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

Distance from Dewey, SD to Addy, WA

Distance

931 mi

Time

16 hours 38 mins

Gas Cost

$87 - $169

There are 740.52 miles from Dewey to Addy in northwest direction and 931 miles (1,498.30 kilometers) by car, following the I-90 route.

Dewey and Addy are 16 hours 38 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Addy, WA. The halfway point is Livingston, MT.

Please note the time difference between Dewey, SD and Addy, WA is 1 hour. The current time in Dewey is 3:34 am and the current time in Addy is 2:34 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Addy, WA? 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 37.39 gallons of gas to cover the route between Dewey, SD and Addy, WA.

The estimated cost of gas to go from Dewey to Addy is $121.95.

During the route, an average car will release 732.48 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 Addy, WA

If you want to meet halfway between Dewey, SD and Addy, WA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.661469 and -110.651474, or 45º 39' 41.2884" N, 110º 39' 5.3064" W. This location is 465.46 miles away from Dewey, SD and Addy, WA and it would take approximately 8 hours 19 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Livingston, MT, situated 481 miles from Dewey, SD and 479 miles from Addy, WA. It would take 7 hours 34 mins to go from Dewey to Livingston and 7 hours 9 mins to go from Addy to Livingston.