There are
2,006 mi
from Temecula, CA to Westchester, IL
That's the driving distance. It would take 1 day 11 hours to go from Temecula, California to Westchester, Illinois.
The flight distance (direct flight from Temecula, CA to Westchester, IL) is 1,691.60 mi.
2,006 mi = 3.22 kms