The franchise won back-to-back AFL Championships in 1964 and 1965. The team reached four straight Super Bowls from 1991 to 1994, but lost all four.
The Bills lost Super Bowl XXV in 1990-91 in heartbreaking fashion when kicker Scott Norwood's late game field goal attempt went wide. They fell to the New York Giants 20-19. The next three Super Bowls were all double digit losses.