There are
2,171 mi
from Dayton, OH to Pasadena, CA
That's the driving distance. It would take 1 day 14 hours to go from Dayton, Ohio to Pasadena, California.
The flight distance (direct flight from Dayton, OH to Pasadena, CA) is 1,902.47 mi.
2,171 mi = 3,493.51 kms