There are
1,528 mi
from Keansburg, NJ to Duncan, OK
That's the driving distance. It would take 1 day 4 hours to go from Keansburg, New Jersey to Duncan, Oklahoma.
The flight distance (direct flight from Keansburg, NJ to Duncan, OK) is 1,364.65 mi.
1,528 mi = 2,459.46 kms