There are
406 mi
from Champaign, IL to Overland Park, KS
That's the driving distance. It would take 7 hours 43 mins to go from Champaign, Illinois to Overland Park, Kansas.
The flight distance (direct flight from Champaign, IL to Overland Park, KS) is 351.19 mi.
406 mi = 653.86 kms