There are
2,145 mi
from Dayton, OH to Upland, CA
That's the driving distance. It would take 1 day 13 hours to go from Dayton, Ohio to Upland, California.
The flight distance (direct flight from Dayton, OH to Upland, CA) is 1,877.37 mi.
2,145 mi = 3,452.26 kms