Miles between Seattle, WA and Duncan, OK

There are
1,960 mi
from Seattle, WA to Duncan, OK

That's the driving distance. It would take 1 day 10 hours to go from Seattle, Washington to Duncan, Oklahoma.

The flight distance (direct flight from Seattle, WA to Duncan, OK) is 1,548.82 mi.

1,960 mi = 1.61 kms