There are
2,040 mi
from Oshkosh, WI to St Helens, OR
That's the driving distance. It would take 1 day 11 hours to go from Oshkosh, Wisconsin to St Helens, Oregon.
The flight distance (direct flight from Oshkosh, WI to St Helens, OR) is 1,668.08 mi.
2,040 mi = 3,283.54 kms