There are
2,140 mi
from Dayton, OH to San Bernardino, CA
That's the driving distance. It would take 1 day 13 hours to go from Dayton, Ohio to San Bernardino, California.
The flight distance (direct flight from Dayton, OH to San Bernardino, CA) is 1,858.08 mi.
2,140 mi = 3.22 kms