There are
1,950 mi
from Upland, CA to Warrenville, IL
That's the driving distance. It would take 1 day 10 hours to go from Upland, California to Warrenville, Illinois.
The flight distance (direct flight from Upland, CA to Warrenville, IL) is 1,682.26 mi.
1,950 mi = 1.61 kms