There are
1,941 mi
from Fontana, CA to Warrenville, IL
That's the driving distance. It would take 1 day 9 hours to go from Fontana, California to Warrenville, Illinois.
The flight distance (direct flight from Fontana, CA to Warrenville, IL) is 1,671.59 mi.
1,941 mi = 1.61 kms