Miles between Lake Forest, CA and Duncan, OK

There are
1,321 mi
from Lake Forest, CA to Duncan, OK

That's the driving distance. It would take 23 hours 33 mins to go from Lake Forest, California to Duncan, Oklahoma.

The flight distance (direct flight from Lake Forest, CA to Duncan, OK) is 1,128.99 mi.

1,321 mi = 1.61 kms