There are
2,196 mi
from Champaign, IL to Greenfield, CA
That's the driving distance. It would take 1 day 14 hours to go from Champaign, Illinois to Greenfield, California.
The flight distance (direct flight from Champaign, IL to Greenfield, CA) is 1,800 mi.
2,196 mi = 3.22 kms