There are
972 mi
from Knoxville, TN to Mankato, MN
That's the driving distance. It would take 18 hours 15 mins to go from Knoxville, Tennessee to Mankato, Minnesota.
The flight distance (direct flight from Knoxville, TN to Mankato, MN) is 776.83 mi.
972 mi = 1,564.23 kms