There are
1,406 mi
from Rialto, CA to Seagoville, TX
That's the driving distance. It would take 1 day to go from Rialto, California to Seagoville, Texas.
The flight distance (direct flight from Rialto, CA to Seagoville, TX) is 1,204.17 mi.
1,406 mi = 1.61 kms