There are
2,170 mi
from Dayton, OH to Rosemead, CA
That's the driving distance. It would take 1 day 14 hours to go from Dayton, Ohio to Rosemead, California.
The flight distance (direct flight from Dayton, OH to Rosemead, CA) is 1,900.37 mi.
2,170 mi = 3,491.72 kms