To find a return route from Sault Ste. Marie to Thunder Bay via Duluth, please enter the source and destination in the given control and click on Return Route Plan to get the complete summary on your return travel. You can add multiple halts you might like to take while traveling. After getting your route planned, you can get the Trip Cost from Sault Ste. Marie to Thunder Bay via Duluth
which gives you a fair estimate of the cost of your journey.