There are
2,179 mi
from Dayton, OH to Downey, CA
That's the driving distance. It would take 1 day 14 hours to go from Dayton, Ohio to Downey, California.
The flight distance (direct flight from Dayton, OH to Downey, CA) is 1,907.20 mi.
2,179 mi = 3,506.30 kms