There are
2,084 mi
from Concord, CA to Warrenville, IL
That's the driving distance. It would take 1 day 11 hours to go from Concord, California to Warrenville, Illinois.
The flight distance (direct flight from Concord, CA to Warrenville, IL) is 1,802.35 mi.
2,084 mi = 3.22 kms