4 (Super Bowls IV, VIII, IX, and XI).
The Minnesota Vikings have appeared in four Super Bowls and lost all four: Super Bowl IV (1970): Kansas City Chiefs 23, Vikings 7 Super Bowl VIII (1974): Miami Dolphins 24, Vikings 7 Super Bowl IX...
So far, in 2010, the Minnesota Vikings have a record of 2-3
32 in the KJV, 48 in the NIV.
Through the 2010 season, the Cowboys lead the all-time series 15 to 14. The total includes regular-season and postseason contests.