The drive from Sturgeon Bay to Portland covers 3,300 kilometers and takes approximately 33 hours. You will head south on WI-57 to Green Bay, then take I-41 to Milwaukee, I-94 to Chicago, I-90 West to Idaho, and finally I-84 West to Portland. This is a long but straightforward route that takes you through some of the major cities of the US. It is a popular path for those traveling for business or visiting family.
Total Distance: 3,300 km driving distance; 2,700 km straight-line air distance.
The drive through Chicago can be very busy; try to avoid rush hour.
Spring or autumn for the pleasant weather.