There are
1,681 mi
from Oshkosh, WI to Lewiston, ID
That's the driving distance. It would take 1 day 5 hours to go from Oshkosh, Wisconsin to Lewiston, Idaho.
The flight distance (direct flight from Oshkosh, WI to Lewiston, ID) is 1,387.30 mi.
1,681 mi = 2,705.78 kms