There are
1,448 mi
from Rialto, CA to Port Lavaca, TX
That's the driving distance. It would take 1 day to go from Rialto, California to Port Lavaca, Texas.
The flight distance (direct flight from Rialto, CA to Port Lavaca, TX) is 1,278.65 mi.
1,448 mi = 1.61 kms