Distance between cities › USA › South Dakota › Custer, SD › Distance from Custer to Okanogan Book Hotels

Distance from Custer, SD to Okanogan, WA

Distance

1,028 mi

Time

18 hours 40 mins

Gas Cost

$94 - $183

There are 827.44 miles from Custer to Okanogan in northwest direction and 1,028 miles (1,654.41 kilometers) by car, following the I-90 route.

Custer and Okanogan are 18 hours 40 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Okanogan, WA. The halfway point is Manhattan, MT.

Please note the time difference between Custer, SD and Okanogan, WA is 1 hour. The current time in Custer is 11:50 pm and the current time in Okanogan is 10:50 pm.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Okanogan, WA? 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 41.28 gallons of gas to cover the route between Custer, SD and Okanogan, WA.

The estimated cost of gas to go from Custer to Okanogan is $132.26.

During the route, an average car will release 808.75 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 Okanogan, WA

If you want to meet halfway between Custer, SD and Okanogan, WA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.860626 and -111.426407, or 45º 51' 38.2536" N, 111º 25' 35.0652" W. This location is 513.93 miles away from Custer, SD and Okanogan, WA and it would take approximately 9 hours 20 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Manhattan, MT, situated 535 miles from Custer, SD and 523 miles from Okanogan, WA. It would take 7 hours 57 mins to go from Custer to Manhattan and 7 hours 56 mins to go from Okanogan to Manhattan.