There are
1,955 mi
from Elgin, IL to Montclair, CA
That's the driving distance. It would take 1 day 10 hours to go from Elgin, Illinois to Montclair, California.
The flight distance (direct flight from Elgin, IL to Montclair, CA) is 1,681.95 mi.
1,955 mi = 1.61 kms