There are
2,041 mi
from Mt Prospect, IL to San Clemente, CA
That's the driving distance. It would take 1 day 11 hours to go from Mt Prospect, Illinois to San Clemente, California.
The flight distance (direct flight from Mt Prospect, IL to San Clemente, CA) is 1,717.11 mi.
2,041 mi = 3,283.95 kms