There are
1,663 mi
from Tempe, AZ to Dekalb, IL
That's the driving distance. It would take 1 day 6 hours to go from Tempe, Arizona to Dekalb, Illinois.
The flight distance (direct flight from Tempe, AZ to Dekalb, IL) is 1,391.71 mi.
1,663 mi = 1.61 kms