There are
329 mi
from Waukegan, IL to Florissant, MO
That's the driving distance. It would take 6 hours 16 mins to go from Waukegan, Illinois to Florissant, Missouri.
The flight distance (direct flight from Waukegan, IL to Florissant, MO) is 279.07 mi.
329 mi = 530.15 kms