There are
2,035 mi
from San Clemente, CA to Mt Prospect, IL
That's the driving distance. It would take 1 day 11 hours to go from San Clemente, California to Mt Prospect, Illinois.
The flight distance (direct flight from San Clemente, CA to Mt Prospect, IL) is 1,717.11 mi.
2,035 mi = 3,274.48 kms