There are
2,793 mi
from Columbia, SC to Milwaukie, OR
That's the driving distance. It would take 2 days 1 hour to go from Columbia, South Carolina to Milwaukie, Oregon.
The flight distance (direct flight from Columbia, SC to Milwaukie, OR) is 2,318.13 mi.
2,793 mi = 3.22 kms