There are
1,784 mi
from Oshkosh, WI to Ontario, OR
That's the driving distance. It would take 1 day 6 hours to go from Oshkosh, Wisconsin to Ontario, Oregon.
The flight distance (direct flight from Oshkosh, WI to Ontario, OR) is 1,404.86 mi.
1,784 mi = 2,870.89 kms