There are
484 mi
from Overland Park, KS to Sycamore, IL
That's the driving distance. It would take 8 hours 58 mins to go from Overland Park, Kansas to Sycamore, Illinois.
The flight distance (direct flight from Overland Park, KS to Sycamore, IL) is 376.74 mi.
484 mi = 779.03 kms