There are
2,141 mi
from Walnut Creek, CA to Waukegan, IL
That's the driving distance. It would take 1 day 12 hours to go from Walnut Creek, California to Waukegan, Illinois.
The flight distance (direct flight from Walnut Creek, CA to Waukegan, IL) is 1,821.05 mi.
2,141 mi = 3,445.56 kms