There are
1,145 mi
from Simi Valley, CA to Woodinville, WA
That's the driving distance. It would take 21 hours 44 mins to go from Simi Valley, California to Woodinville, Washington.
The flight distance (direct flight from Simi Valley, CA to Woodinville, WA) is 948 mi.
1,145 mi = 1.61 kms