There are
1,670 mi
from Bismarck, ND to Harlingen, TX
That's the driving distance. It would take 1 day 6 hours to go from Bismarck, North Dakota to Harlingen, Texas.
The flight distance (direct flight from Bismarck, ND to Harlingen, TX) is 1,434.54 mi.
1,670 mi = 2,687.87 kms