The buffalo Bills
The Buffalo Bills
The Buffalo Bills have the most consecutive appearances in a Super Bowl. The went to Super Bowls XXV, XXVI, XXVII, and XXVIII. The lost all four games.
Don Shula of the Miami Dolphins was the first head coach to lead his team to three consecutive Super Bowls. The Dolphins lost Super Bowl VI, but prevailed in Super Bowls VII and VIII.
The Buffalo Bills
No NFL team has ever won three consecutive Super Bowls.
The Cowboys won back-to-back Super Bowl titles after the 1992 and 1993 seasons. No NFL team has ever won three in a row.
Thurman Thomas scored 1 touchdown in each of 4 consecutive Super Bowls with the Buffalo Bills. The Bills are the only team to ever play in 4 consecutive Super Bowls, but lost all four games: Super Bowl XXV, XXVI, XXVII, and XXVIII.
The Bills made 4 consecutive Super Bowls, after the 1990, 1991, 1992 and 1993 seasons. Their Super Bowls were played in January of the following year. (see related question)
That was the Green Bay Packers who won the first two Super Bowls played in 1967 and 1968.
No team has ever won 3 super bowls in a row.
Miami Dolphins - Super Bowls VI, VII, and VIII.