There are
1,823 mi
from Harlingen, TX to Tonawanda, NY
That's the driving distance. It would take 1 day 10 hours to go from Harlingen, Texas to Tonawanda, New York.
The flight distance (direct flight from Harlingen, TX to Tonawanda, NY) is 1,571.96 mi.
1,823 mi = 2,933.23 kms