There are
988 mi
from Knoxville, TN to Altus, OK
That's the driving distance. It would take 17 hours 29 mins to go from Knoxville, Tennessee to Altus, Oklahoma.
The flight distance (direct flight from Knoxville, TN to Altus, OK) is 873.03 mi.
988 mi = 1,589.66 kms