There are
636 mi
from Johnson City, TN to Hackensack, NJ
That's the driving distance. It would take 12 hours 4 mins to go from Johnson City, Tennessee to Hackensack, New Jersey.
The flight distance (direct flight from Johnson City, TN to Hackensack, NJ) is 548.38 mi.
636 mi = 1,023.81 kms