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

Distance from Dewey, SD to Flagstaff, AZ

Distance

1,004 mi

Time

18 hours 53 mins

Gas Cost

$94 - $182

There are 704.08 miles from Dewey to Flagstaff in southwest direction and 1,004 miles (1,615.78 kilometers) by car, following the I-70 route.

Dewey and Flagstaff are 18 hours 53 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Flagstaff, AZ.

Please note the time difference between Dewey, SD and Flagstaff, AZ is 1 hour. The current time in Dewey is 6:21 am and the current time in Flagstaff is 5:21 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Flagstaff, AZ? 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 40.32 gallons of gas to cover the route between Dewey, SD and Flagstaff, AZ.

The estimated cost of gas to go from Dewey to Flagstaff is $131.53.

During the route, an average car will release 790.01 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 Flagstaff, AZ

If you want to meet halfway between Dewey, SD and Flagstaff, AZ or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 39.544744 and -107.652231, or 39º 32' 41.0784" N, 107º 39' 8.0316" W. This location is 502.02 miles away from Dewey, SD and Flagstaff, AZ and it would take approximately 9 hours 26 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Silt, CO, situated 502 miles from Dewey, SD and 502 miles from Flagstaff, AZ. It would take 9 hours 15 mins to go from Dewey to Silt and 9 hours 40 mins to go from Flagstaff to Silt.