There are
1,102 mi
from Harlingen, TX to Maryville, MO
That's the driving distance. It would take 19 hours 57 mins to go from Harlingen, Texas to Maryville, Missouri.
The flight distance (direct flight from Harlingen, TX to Maryville, MO) is 991.40 mi.
1,102 mi = 1,773.32 kms