Miles between Rockville, MD and Duncan, OK

There are
1,421 mi
from Rockville, MD to Duncan, OK

That's the driving distance. It would take 1 day 1 hour to go from Rockville, Maryland to Duncan, Oklahoma.

The flight distance (direct flight from Rockville, MD to Duncan, OK) is 1,190.88 mi.

1,421 mi = 2,286.53 kms