There are
1,630 mi
from Olathe, KS to Simi Valley, CA
That's the driving distance. It would take 1 day 4 hours to go from Olathe, Kansas to Simi Valley, California.
The flight distance (direct flight from Olathe, KS to Simi Valley, CA) is 1,362.92 mi.
1,630 mi = 1.61 kms