There are
2,079 mi
from Ventura, CA to Grayslake, IL
That's the driving distance. It would take 1 day 12 hours to go from Ventura, California to Grayslake, Illinois.
The flight distance (direct flight from Ventura, CA to Grayslake, IL) is 1,768.81 mi.
2,079 mi = 3.22 kms