There are
2,306 mi
from Rosemead, CA to Amherst, OH
That's the driving distance. It would take 1 day 16 hours to go from Rosemead, California to Amherst, Ohio.
The flight distance (direct flight from Rosemead, CA to Amherst, OH) is 2,007.55 mi.
2,306 mi = 3,710.40 kms