Miles between Boulder, CO and Napa, CA

There are
1,219 mi
from Boulder, CO to Napa, CA

That's the driving distance. It would take 20 hours 55 mins to go from Boulder, Colorado to Napa, California.

The flight distance (direct flight from Boulder, CO to Napa, CA) is 918.45 mi.

1,219 mi = 1,961.01 kms