There are
1,685 mi
from Bismarck, ND to Milford, CT
That's the driving distance. It would take 1 day 6 hours to go from Bismarck, North Dakota to Milford, Connecticut.
The flight distance (direct flight from Bismarck, ND to Milford, CT) is 1,421.88 mi.
1,685 mi = 2,712.08 kms