There are
974 mi
from Simi Valley, CA to Troutdale, OR
That's the driving distance. It would take 18 hours 25 mins to go from Simi Valley, California to Troutdale, Oregon.
The flight distance (direct flight from Simi Valley, CA to Troutdale, OR) is 801.56 mi.
974 mi = 1,567.29 kms