There are
1,907 mi
from Columbia, MO to Washougal, WA
That's the driving distance. It would take 1 day 8 hours to go from Columbia, Missouri to Washougal, Washington.
The flight distance (direct flight from Columbia, MO to Washougal, WA) is 1,591.21 mi.
1,907 mi = 1.61 kms