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

Distance from Custer, SD to PDX Airport

Distance

1,233 mi

Time

21 hours 52 mins

Gas Cost

$113 - $219

Helpful Inaccurate

There are 939.48 miles from Custer to Portland International Airport (PDX) in west direction and 1,233 miles (1,984.32 kilometers) by car, following the I-90 route.

Custer and PDX Airport are 21 hours 52 mins far apart, if you drive non-stop .

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

Please note the time difference between Custer, SD and PDX Airport is 1 hour. The current time in Custer is 7:07 pm and the current time in PDX Airport is 6:07 pm.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to PDX Airport? Here there are some offers to rent a car in Custer, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Custer »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 49.52 gallons of gas to cover the route between Custer, SD and PDX Airport.

The estimated cost of gas to go from Custer to PDX Airport is $158.66.

During the route, an average car will release 970.18 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Custer, SD and PDX Airport

If you want to meet halfway between Custer, 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 46.348427 and -112.743973, or 46º 20' 54.3372" N, 112º 44' 38.3028" W. This location is 616.51 miles away from Custer, SD and PDX Airport and it would take approximately 10 hours 56 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 636 miles from Custer, SD and 616 miles from PDX Airport. It would take 9 hours 18 mins to go from Custer to Deer Lodge and 9 hours 14 mins to go from PDX to Deer Lodge.