Miles between Ontario, CA and Larkspur, CA

There are
427 mi
from Ontario, CA to Larkspur, CA

That's the driving distance. It would take 8 hours 2 mins to go from Ontario, California to Larkspur, California.

The flight distance (direct flight from Ontario, CA to Larkspur, CA) is 382.06 mi.

427 mi = 687.37 kms