There are
1,025 mi
from Waukegan, IL to Gillette, WY
That's the driving distance. It would take 17 hours 40 mins to go from Waukegan, Illinois to Gillette, Wyoming.
The flight distance (direct flight from Waukegan, IL to Gillette, WY) is 895.62 mi.
1,025 mi = 1.61 kms