There are
2,020 mi
from Temecula, CA to Mt Prospect, IL
That's the driving distance. It would take 1 day 11 hours to go from Temecula, California to Mt Prospect, Illinois.
The flight distance (direct flight from Temecula, CA to Mt Prospect, IL) is 1,691.49 mi.
2,020 mi = 3,250.51 kms