There are
998 mi
from Downey, CA to Washougal, WA
That's the driving distance. It would take 18 hours 52 mins to go from Downey, California to Washougal, Washington.
The flight distance (direct flight from Downey, CA to Washougal, WA) is 834.74 mi.
998 mi = 1,605.96 kms