There are
2,417 mi
from Dayton, OH to Los Altos, CA
That's the driving distance. It would take 1 day 18 hours to go from Dayton, Ohio to Los Altos, California.
The flight distance (direct flight from Dayton, OH to Los Altos, CA) is 2,039.80 mi.
2,417 mi = 3.22 kms