There are
1,965 mi
from Schaumburg, IL to Montclair, CA
That's the driving distance. It would take 1 day 10 hours to go from Schaumburg, Illinois to Montclair, California.
The flight distance (direct flight from Schaumburg, IL to Montclair, CA) is 1,691.92 mi.
1,965 mi = 3,163.03 kms