The Buffalo Bills
The bills =D They were in the super bowl from 90-94 and lost all 4 games. Courtesy to Jaydan ;)
denver broncos
Chicago bears From 1933, when the first NFL championship game was played, to 2008, when Super Bowl XLII was played, the team that has lost the most NFL championship games is the New York Giants who have lost 11 NFL championship games (pre Super Bowl) and 1 Super Bowl for a total of 12.
The Buffalo Bills
Steeles
Through Super Bowl XLIII, no. Additionally, there has only been one Super Bowl winner that lost the final two games of the regular season and won the Super Bowl. That was the 1967 Green Bay Packers who lost to the Rams and Steelers and won Super Bowl II.
2011 NY Giants lost 7 games during the season
redskins
Kansas City Chiefs were the fist team to lose a Super Bowl.
The Minnesota Vikings lost to the Dolphins in Super Bowl VIII, the Steelers in Super Bowl IX, and the Raiders in Super Bowl XI.
In Super Bowl XXV on January 25, 1991, the New York Giants defeated the Buffalo Bills 20-19.
No National Football League team has ever lost the Super Bowl seven times. The record for most Super Bowl losses is five, held by the Denver Broncos. They have won twice.