There are
905 mi
from Waterbury, CT to Grayslake, IL
That's the driving distance. It would take 17 hours 2 mins to go from Waterbury, Connecticut to Grayslake, Illinois.
The flight distance (direct flight from Waterbury, CT to Grayslake, IL) is 771.19 mi.
905 mi = 1,457.05 kms