There are
2,122 mi
from Concord, CA to Deerfield, IL
That's the driving distance. It would take 1 day 12 hours to go from Concord, California to Deerfield, Illinois.
The flight distance (direct flight from Concord, CA to Deerfield, IL) is 1,818.10 mi.
2,122 mi = 3.22 kms