2 times
Miami Dolphins in Superbowl VII & XVII Oakland Raiders in Superbowl XVIII Denver Broncos in Superbowl XXII Buffalo Bills in Superbowl XXVI
I think it's 2 but if the 2011 superbowl steelers win then it will be 3.
Six times in twelve career meetings plus a win in Superbowl XXIV, winning 55-10.
Their perfect season ended with a win in the Superbowl on January 14, 1973. They also won the Super Bowl the next year on January 13, 1974.
The Dolphins have won at Buffalo 25 times entering 2013.
They have yet to win a superbowl. But have won a world championship. Which were called that before the term superbowl.
Three.
The 72' Miami Dolphins went undefeated in a 14 game regular season and then went on to win the Superbowl. The 85' Chicago Bears were in line for an undefeated season and suffered their only loss to.... the Miami Dolphins! The 2007 New England Patriots went undefeated during the regular season, the only team to do so with a 16 game schedule, and would eventually lose to the New York Giants in the Superbowl.
75
11
17 games
Cowboys have beaten the Bills twice to win Superbowl 27 and Superbowl 28. Superbowl 27 in 1993: Cowboys 52 - Bills 17 Superbowl 28 in 1994: Cowboys 30 - Bills 13