There are
1,996 mi
from Irvine, CA to Westmont, IL
That's the driving distance. It would take 1 day 11 hours to go from Irvine, California to Westmont, Illinois.
The flight distance (direct flight from Irvine, CA to Westmont, IL) is 1,712.76 mi.
1,996 mi = 1.61 kms