Miles between Longmont, CO and Duncan, OK

There are
694 mi
from Longmont, CO to Duncan, OK

That's the driving distance. It would take 13 hours 8 mins to go from Longmont, Colorado to Duncan, Oklahoma.

The flight distance (direct flight from Longmont, CO to Duncan, OK) is 553.91 mi.

694 mi = 1,116.83 kms