There are
922 mi
from Oshkosh, WI to Gillette, WY
That's the driving distance. It would take 16 hours 17 mins to go from Oshkosh, Wisconsin to Gillette, Wyoming.
The flight distance (direct flight from Oshkosh, WI to Gillette, WY) is 839.37 mi.
922 mi = 1,483.70 kms