There are
935 mi
from Oshkosh, WI to Williston, ND
That's the driving distance. It would take 16 hours 49 mins to go from Oshkosh, Wisconsin to Williston, North Dakota.
The flight distance (direct flight from Oshkosh, WI to Williston, ND) is 774.93 mi.
935 mi = 1,504.41 kms