There are
2,091 mi
from Antioch, CA to Westchester, IL
That's the driving distance. It would take 1 day 12 hours to go from Antioch, California to Westchester, Illinois.
The flight distance (direct flight from Antioch, CA to Westchester, IL) is 1,805.11 mi.
2,091 mi = 3,365.10 kms