Miles between Diamond Bar, CA and Duncan, OK

There are
1,292 mi
from Diamond Bar, CA to Duncan, OK

That's the driving distance. It would take 22 hours 38 mins to go from Diamond Bar, California to Duncan, Oklahoma.

The flight distance (direct flight from Diamond Bar, CA to Duncan, OK) is 1,132.24 mi.

1,292 mi = 2,078.78 kms