There are
729 mi
from Poplar Bluff, MO to Amarillo, TX
That's the driving distance. It would take 13 hours 2 mins to go from Poplar Bluff, Missouri to Amarillo, Texas.
The flight distance (direct flight from Poplar Bluff, MO to Amarillo, TX) is 647.77 mi.
729 mi = 1,172.87 kms