There are
1,950 mi
from Dekalb, IL to Montebello, CA
That's the driving distance. It would take 1 day 10 hours to go from Dekalb, Illinois to Montebello, California.
The flight distance (direct flight from Dekalb, IL to Montebello, CA) is 1,680.41 mi.
1,950 mi = 3,137.68 kms