There are
2,003 mi
from Markham, IL to Rosemead, CA
That's the driving distance. It would take 1 day 10 hours to go from Markham, Illinois to Rosemead, California.
The flight distance (direct flight from Markham, IL to Rosemead, CA) is 1,726.73 mi.
2,003 mi = 3,222.93 kms