There are
780 mi
from Walnut Creek, CA to Covington, WA
That's the driving distance. It would take 15 hours 1 min to go from Walnut Creek, California to Covington, Washington.
The flight distance (direct flight from Walnut Creek, CA to Covington, WA) is 653.59 mi.
780 mi = 1,255.33 kms