There are
1,814 mi
from Olathe, KS to Milwaukie, OR
That's the driving distance. It would take 1 day 7 hours to go from Olathe, Kansas to Milwaukie, Oregon.
The flight distance (direct flight from Olathe, KS to Milwaukie, OR) is 1,486.56 mi.
1,814 mi = 1.61 kms