There are
1,940 mi
from Seattle, WA to Oshkosh, WI
That's the driving distance. It would take 1 day 9 hours to go from Seattle, Washington to Oshkosh, Wisconsin.
The flight distance (direct flight from Seattle, WA to Oshkosh, WI) is 1,632.61 mi.
1,940 mi = 1.61 kms