【How-to】Where does i 90 start and end

Interstate 90 (AKA I-90), is a coast-to-coast, transcontinental freeway, and it just so happens to be America’s longest Interstate Highway. … In the east, I-90 begins right by Boston’s Logan Airport, passes through the Continental Divide by Butte, Montana and ends in Seattle, near Safeco and CenturyLink Field.