There are
557 mi
from Olathe, KS to Deerfield, IL
That's the driving distance. It would take 10 hours 23 mins to go from Olathe, Kansas to Deerfield, Illinois.
The flight distance (direct flight from Olathe, KS to Deerfield, IL) is 430.87 mi.
557 mi = 896.97 kms