There are
501 mi
from Rowlett, TX to Poplar Bluff, MO
That's the driving distance. It would take 8 hours 50 mins to go from Rowlett, Texas to Poplar Bluff, Missouri.
The flight distance (direct flight from Rowlett, TX to Poplar Bluff, MO) is 439.61 mi.
501 mi = 805.68 kms