There are
1,936 mi
from Dekalb, IL to Beaumont, CA
That's the driving distance. It would take 1 day 9 hours to go from Dekalb, Illinois to Beaumont, California.
The flight distance (direct flight from Dekalb, IL to Beaumont, CA) is 1,625.65 mi.
1,936 mi = 3,115.02 kms