There are
1,961 mi
from Irvine, CA to Sycamore, IL
That's the driving distance. It would take 1 day 10 hours to go from Irvine, California to Sycamore, Illinois.
The flight distance (direct flight from Irvine, CA to Sycamore, IL) is 1,679 mi.
1,961 mi = 1.61 kms