There are
2,012 mi
from Portland, OR to Oshkosh, WI
That's the driving distance. It would take 1 day 11 hours to go from Portland, Oregon to Oshkosh, Wisconsin.
The flight distance (direct flight from Portland, OR to Oshkosh, WI) is 1,664.75 mi.
2,012 mi = 3.22 kms