There are
743 mi
from Chattanooga, TN to Oshkosh, WI
That's the driving distance. It would take 14 hours 30 mins to go from Chattanooga, Tennessee to Oshkosh, Wisconsin.
The flight distance (direct flight from Chattanooga, TN to Oshkosh, WI) is 643.72 mi.
743 mi = 1,195.74 kms