There are
1,677 mi
from Harlingen, TX to Mandan, ND
That's the driving distance. It would take 1 day 6 hours to go from Harlingen, Texas to Mandan, North Dakota.
The flight distance (direct flight from Harlingen, TX to Mandan, ND) is 1,436.49 mi.
1,677 mi = 2,699.67 kms