There are
1,566 mi
from Olathe, KS to Fontana, CA
That's the driving distance. It would take 1 day 3 hours to go from Olathe, Kansas to Fontana, California.
The flight distance (direct flight from Olathe, KS to Fontana, CA) is 1,295.42 mi.
1,566 mi = 1.61 kms