There are
1,918 mi
from Upland, CA to Dekalb, IL
That's the driving distance. It would take 1 day 9 hours to go from Upland, California to Dekalb, Illinois.
The flight distance (direct flight from Upland, CA to Dekalb, IL) is 1,654.18 mi.
1,918 mi = 1.61 kms