There are
848 mi
from Knoxville, TN to Seagoville, TX
That's the driving distance. It would take 15 hours 2 mins to go from Knoxville, Tennessee to Seagoville, Texas.
The flight distance (direct flight from Knoxville, TN to Seagoville, TX) is 755.18 mi.
848 mi = 1,365.06 kms