There are
785 mi
from Bismarck, ND to Sycamore, IL
That's the driving distance. It would take 14 hours 1 min to go from Bismarck, North Dakota to Sycamore, Illinois.
The flight distance (direct flight from Bismarck, ND to Sycamore, IL) is 682.69 mi.
785 mi = 1,264.04 kms