There have only been seven teams to win back-to-back Super Bowls. One team did it twice. In chronological order, those teams are:
AFL vs. NFL Championship, 1967; Super Bowl II, 1968: Green Bay Packers
Super Bowl VII, 1973; Super Bowl VIII, 1974: Miami Dolphins
Super Bowl IX, 1975; Super Bowl X, 1976: Pittsburgh Steelers
Super Bowl XIII, 1979; Super Bowl XIV, 1980: Pittsburgh Steelers
Super Bowl XXIII, 1989; Super Bowl XXIV, 1990: San Francisco 49ers
Super Bowl XXVII, 1993; Super Bowl XXVIII, 1994: Dallas Cowboys
Super Bowl XXXII, 1998; Super Bowl XXXIII, 1999: Denver Broncos
Super Bowl XXXVIII, 2004; Super Bowl XXXIX, 2005: New England Patriots
(Jim Kelly of the Buffalo Bills did not have any repeat championships. As a matter of fact, he did not have any. However, the Bills are very notorious for going to four Super Bowls in a row from '91-'94 and losing every one of them.
That is why they got the nickname Boy I Love Losing Super Bowls. Shorten that into an acronym, and what do you get? B.I.L.L.S.)
Sorry, the Bills did not make the list. If this were a list of the worst Super Bowl teams ever, they would be number one. However, this is the real list.