There are
398 mi
from Peoria, IL to Leavenworth, KS
That's the driving distance. It would take 7 hours 33 mins to go from Peoria, Illinois to Leavenworth, Kansas.
The flight distance (direct flight from Peoria, IL to Leavenworth, KS) is 297.95 mi.
398 mi = 639.87 kms