There are
2,024 mi
from San Clemente, CA to Lemont, IL
That's the driving distance. It would take 1 day 11 hours to go from San Clemente, California to Lemont, Illinois.
The flight distance (direct flight from San Clemente, CA to Lemont, IL) is 1,709.06 mi.
2,024 mi = 3,256.68 kms