There are
1,817 mi
from Rosemead, CA to Troy, MO
That's the driving distance. It would take 1 day 7 hours to go from Rosemead, California to Troy, Missouri.
The flight distance (direct flight from Rosemead, CA to Troy, MO) is 1,535.67 mi.
1,817 mi = 2,923.87 kms