There are
518 mi
from Schaumburg, IL to Leavenworth, KS
That's the driving distance. It would take 10 hours to go from Schaumburg, Illinois to Leavenworth, Kansas.
The flight distance (direct flight from Schaumburg, IL to Leavenworth, KS) is 404.58 mi.
518 mi = 833.90 kms