There are
935 mi
from Dayton, OH to New Smyrna Beach, FL
That's the driving distance. It would take 17 hours 47 mins to go from Dayton, Ohio to New Smyrna Beach, Florida.
The flight distance (direct flight from Dayton, OH to New Smyrna Beach, FL) is 764.43 mi.
935 mi = 1,505.51 kms