Distance between cities › USA › South Dakota › Dewey, SD › Distance from Dewey to Portland International Airport Book Hotels

Distance from Dewey, SD to PDX Airport

Distance

1,225 mi

Time

21 hours 56 mins

Gas Cost

$114 - $222

Helpful Inaccurate

There are 922.28 miles from Dewey to Portland International Airport (PDX) in west direction and 1,225 miles (1,971.45 kilometers) by car, following the I-90 route.

Dewey and PDX Airport are 21 hours 56 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to PDX Airport. The halfway point is Deer Lodge, MT.

Please note the time difference between Dewey, SD and PDX Airport is 1 hour. The current time in Dewey is 6:04 am and the current time in PDX Airport is 5:04 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to PDX Airport? 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 49.19 gallons of gas to cover the route between Dewey, SD and PDX Airport.

The estimated cost of gas to go from Dewey to PDX Airport is $160.47.

During the route, an average car will release 963.79 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 PDX Airport

If you want to meet halfway between Dewey, SD and PDX Airport or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.455269 and -112.728210, or 46º 27' 18.9684" N, 112º 43' 41.556" W. This location is 612.45 miles away from Dewey, SD and PDX Airport and it would take approximately 10 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 Deer Lodge, MT, situated 628 miles from Dewey, SD and 616 miles from PDX Airport. It would take 9 hours 31 mins to go from Dewey to Deer Lodge and 9 hours 14 mins to go from PDX to Deer Lodge.