There are
1,945 mi
from Rockford, IL to Glendora, CA
That's the driving distance. It would take 1 day 9 hours to go from Rockford, Illinois to Glendora, California.
The flight distance (direct flight from Rockford, IL to Glendora, CA) is 1,650.62 mi.
1,945 mi = 1.61 kms