There are
2,162 mi
from Dayton, OH to Monrovia, CA
That's the driving distance. It would take 1 day 14 hours to go from Dayton, Ohio to Monrovia, California.
The flight distance (direct flight from Dayton, OH to Monrovia, CA) is 1,894.96 mi.
2,162 mi = 3,480.00 kms