There are
1,616 mi
from Olathe, KS to Fountain Valley, CA
That's the driving distance. It would take 1 day 3 hours to go from Olathe, Kansas to Fountain Valley, California.
The flight distance (direct flight from Olathe, KS to Fountain Valley, CA) is 1,332.88 mi.
1,616 mi = 1.61 kms