There are
1,422 mi
from Rosemead, CA to Duncanville, TX
That's the driving distance. It would take 1 day to go from Rosemead, California to Duncanville, Texas.
The flight distance (direct flight from Rosemead, CA to Duncanville, TX) is 1,223.10 mi.
1,422 mi = 2,288.64 kms