They have lost the Super Bowl four times.
The Buffalo Bills lost four Super Bowls (Super Bowl XXV, XXVI, XXVII, and XXVIII).
No, but they have played in 4.The Buffalo Bills have not won the Super Bowl as of 2011.
As of Super Bowl XLII, the Bills have never won a Super Bowl.
The Buffalo Bills have gone to the Superbowl 4 times and lost all four times.
Super Bowl XXV
The Buffalo Bills have played in four Super Bowls, but lost.
The Cowboys beat the Buffalo Bills in Super Bowl XXVII (1993) and Super Bowl XXVIII (1994).