Miles between San Bernardino, CA and Duncan, OK

There are
1,271 mi
from San Bernardino, CA to Duncan, OK

That's the driving distance. It would take 22 hours 13 mins to go from San Bernardino, California to Duncan, Oklahoma.

The flight distance (direct flight from San Bernardino, CA to Duncan, OK) is 1,102.03 mi.

1,271 mi = 2,044.80 kms