Through the 2008 season, 6:
1) 1980 - Eagles 20, Dallas Cowboys 7
2) 2001 - St. Louis Rams 29, Eagles 24
3) 2002 - Tampa Bay Buccaneers 27, Eagles 10
4) 2003 - Carolina Panthers 14, Eagles 3
5) 2004 - Eagles 27, Atlanta Falcons 10
6) 2008 - Arizona Cardinals 32, Eagles 25
The Atlanta Falcons have only competed in 2 NFC Championship games. The first was against the Minnesota Vikings in 1998 where the won 30-27 (OT) @MIN. There second appearance was a loss in 2004 to the Philadelphia Eagles 27-10 @PHI. To this day, an NFC Championship game has never taken place in Atlanta.
Here they are:
So, in summary, the Minnesota Vikings have been to the NFC Conference Championship eight times. Their record at said game is 3-5.
Although the Vikings won one NFL Championship in 1969, that was before the merger of the NFL and AFL in 1970, which accounts for the reason why they have won three NFC Championships but lost four Super Bowls. (No, I'm not trying to rub it in. Just giving the facts. I actually like the Vikings.)
Hope this helps!
Sources:
http://www.nfl.com/standings
http://www.profootballhof.com/history/team/minnesota-vikings/
http://football.about.com/od/nflhistory/a/nflchampions.htm
http://football.about.com/od/nflhistory/l/bl_nflstandings.htm
http://football.about.com/od/teamsvikings/a/playoffhistmin.htm
http://sportsillustrated.cnn.com/football/nfl/1998/playoffs/news/1999/01/17/falcons_first/
Minnesota Vikings
Mall of America Metrodome In Minneapolis, Minnesota
AFC: Jets NFC: Vikings
Hubert H. Humphrey Metrodome In Minneapolis, Minnesota
For 2011 the Minessota Vikings averaged 21.25 points per game and only won 3 games.
Minnesota Vikings and New Orleans Saints
The Minnesota Vikings, who were the losing team in Super Bowls IV, VIII, IX and XI.
Currently in 2012, the Minnesota Vikings have a 7-6record.
In 2005, the Minnesota Vikings had a 9-7 record.
Minnesota Vikings
The Minnesota Vikings play football. They play their home games at the Hubert H. Humphrey Metrodome in Minneapolis, Minnesota and have been playing there since 1962.
Mall of America Metrodome In Minneapolis, Minnesota
The Minnesota Vikings of the NFL (American football) currently play at the Metrodome. The Minnesota Golden Gophers (NCAA baseball) and the Minnesota United FC (soccer) also play games at the Metrodome.
The Minnesota Vikings.
AFC: Jets NFC: Vikings
Minnesota Detroit new York
Hubert H. Humphrey Metrodome In Minneapolis, Minnesota