There are
1,970 mi
from Elgin, IL to Monrovia, CA
That's the driving distance. It would take 1 day 10 hours to go from Elgin, Illinois to Monrovia, California.
The flight distance (direct flight from Elgin, IL to Monrovia, CA) is 1,695.61 mi.
1,970 mi = 1.61 kms