There are
2,048 mi
from St Louis, MO to Milwaukie, OR
That's the driving distance. It would take 1 day 11 hours to go from St Louis, Missouri to Milwaukie, Oregon.
The flight distance (direct flight from St Louis, MO to Milwaukie, OR) is 1,717.07 mi.
2,048 mi = 3.22 kms