There are
2,181 mi
from Irvine, CA to Dayton, OH
That's the driving distance. It would take 1 day 14 hours to go from Irvine, California to Dayton, Ohio.
The flight distance (direct flight from Irvine, CA to Dayton, OH) is 1,895.98 mi.
2,181 mi = 3.22 kms