There are
1,941 mi
from Simi Valley, CA to Slidell, LA
That's the driving distance. It would take 1 day 9 hours to go from Simi Valley, California to Slidell, Louisiana.
The flight distance (direct flight from Simi Valley, CA to Slidell, LA) is 1,710.57 mi.
1,941 mi = 1.61 kms