There are
2,183 mi
from Dayton, OH to Fountain Valley, CA
That's the driving distance. It would take 1 day 14 hours to go from Dayton, Ohio to Fountain Valley, California.
The flight distance (direct flight from Dayton, OH to Fountain Valley, CA) is 1,903.75 mi.
2,183 mi = 3,513.24 kms