There are
1,535 mi
from Harlingen, TX to Smithfield, NC
That's the driving distance. It would take 1 day 4 hours to go from Harlingen, Texas to Smithfield, North Carolina.
The flight distance (direct flight from Harlingen, TX to Smithfield, NC) is 1,312.82 mi.
1,535 mi = 2,470.29 kms