There are
1,548 mi
from Rialto, CA to Galveston, TX
That's the driving distance. It would take 1 day 2 hours to go from Rialto, California to Galveston, Texas.
The flight distance (direct flight from Rialto, CA to Galveston, TX) is 1,364.63 mi.
1,548 mi = 1.61 kms