There are
1,424 mi
from Simi Valley, CA to Southlake, TX
That's the driving distance. It would take 1 day 1 hour to go from Simi Valley, California to Southlake, Texas.
The flight distance (direct flight from Simi Valley, CA to Southlake, TX) is 1,246.71 mi.
1,424 mi = 2,292.07 kms