There are
1,536 mi
from Simi Valley, CA to Port Lavaca, TX
That's the driving distance. It would take 1 day 2 hours to go from Simi Valley, California to Port Lavaca, Texas.
The flight distance (direct flight from Simi Valley, CA to Port Lavaca, TX) is 1,359.95 mi.
1,536 mi = 1.61 kms