There are
817 mi
from Bismarck, ND to Prospect Heights, IL
That's the driving distance. It would take 14 hours 27 mins to go from Bismarck, North Dakota to Prospect Heights, Illinois.
The flight distance (direct flight from Bismarck, ND to Prospect Heights, IL) is 711.19 mi.
817 mi = 1,314.73 kms