There are
631 mi
from Amarillo, TX to Maryville, MO
That's the driving distance. It would take 11 hours 36 mins to go from Amarillo, Texas to Maryville, Missouri.
The flight distance (direct flight from Amarillo, TX to Maryville, MO) is 519.03 mi.
631 mi = 1,015.73 kms