Miles between Napa, CA and Diamond Bar, CA

There are
426 mi
from Napa, CA to Diamond Bar, CA

That's the driving distance. It would take 7 hours 59 mins to go from Napa, California to Diamond Bar, California.

The flight distance (direct flight from Napa, CA to Diamond Bar, CA) is 387.17 mi.

426 mi = 686.32 kms