There are
2,378 mi
from Dayton, OH to Larkspur, CA
That's the driving distance. It would take 1 day 17 hours to go from Dayton, Ohio to Larkspur, California.
The flight distance (direct flight from Dayton, OH to Larkspur, CA) is 2,051.42 mi.
2,378 mi = 3.22 kms