Which two teams have gone the longest without winning an NFL championship?
Arizona and Detroit (and those teams play this week). Arizona last won an NFL title as the Chicago Cardinals in 1947. The Lions won their last NFL title in 1957. Other teams that have gone more than 50 years without a championship: Titans (AFL champs in 1961), Chargers (AFL 1963), Browns (1964), Bills (AFL 1965), Falcons (founded in 1966 – no titles), Bengals (founded in 1968 – no titles), Jets (1968), Vikings (NFL 1969).