There are
1,975 mi
from Rialto, CA to Grayslake, IL
That's the driving distance. It would take 1 day 10 hours to go from Rialto, California to Grayslake, Illinois.
The flight distance (direct flight from Rialto, CA to Grayslake, IL) is 1,680.52 mi.
1,975 mi = 1.61 kms