Miles between Napa, CA and Duncan, OK

There are
1,636 mi
from Napa, CA to Duncan, OK

That's the driving distance. It would take 1 day 5 hours to go from Napa, California to Duncan, Oklahoma.

The flight distance (direct flight from Napa, CA to Duncan, OK) is 1,374.68 mi.

1,636 mi = 1.61 kms