There are
1,939 mi
from Harlingen, TX to Florham Park, NJ
That's the driving distance. It would take 1 day 12 hours to go from Harlingen, Texas to Florham Park, New Jersey.
The flight distance (direct flight from Harlingen, TX to Florham Park, NJ) is 1,670.55 mi.
1,939 mi = 3,120.49 kms