There are
1,245 mi
from Arvada, CO to Milwaukie, OR
That's the driving distance. It would take 21 hours 32 mins to go from Arvada, Colorado to Milwaukie, Oregon.
The flight distance (direct flight from Arvada, CO to Milwaukie, OR) is 971.16 mi.
1,245 mi = 1.61 kms