There are
1,033 mi
from Simi Valley, CA to Yakima, WA
That's the driving distance. It would take 20 hours 1 min to go from Simi Valley, California to Yakima, Washington.
The flight distance (direct flight from Simi Valley, CA to Yakima, WA) is 856.86 mi.
1,033 mi = 1.61 kms