The longest field goal in the history of the NFL is 64 yards, by Matt Prater (2013).
It was a 51 yard field goal by Patrick McAfee (WVU) vs Pitt
The longest field goal in Super Bowl XLVI (46) was 38 yards. It was made by Lawrence Tynes of the New York Giants in the 3rd quarter.
54 yards in 2000, 1998, and 1991
Giants 38 yds
63 yards according to http://www.mmbolding.com/BSR/Longest_Field_Goal_in_NFL_History.htm
Jason Elam, Denver Broncos, 63 yards
It was made by Carson Wigg the kicker for Purdue and was 55 yards
52 yards just made today 9-12-10 vs Atlanta
Two tied at 63 yards. Janikowski and Akers both have made field goals from 63 yards