There are
1,668 mi
from Brownsville, TX to Simi Valley, CA
That's the driving distance. It would take 1 day 4 hours to go from Brownsville, Texas to Simi Valley, California.
The flight distance (direct flight from Brownsville, TX to Simi Valley, CA) is 1,393.85 mi.
1,668 mi = 1.61 kms