There are
661 mi
from Oshkosh, WI to Smyrna, TN
That's the driving distance. It would take 12 hours 37 mins to go from Oshkosh, Wisconsin to Smyrna, Tennessee.
The flight distance (direct flight from Oshkosh, WI to Smyrna, TN) is 565.82 mi.
661 mi = 1,063.90 kms