There are
1,971 mi
from Costa Mesa, CA to Sycamore, IL
That's the driving distance. It would take 1 day 10 hours to go from Costa Mesa, California to Sycamore, Illinois.
The flight distance (direct flight from Costa Mesa, CA to Sycamore, IL) is 1,686.68 mi.
1,971 mi = 1.61 kms