1969, Superbowl III.
One time, in super bowl 3 over the Baltimore Colts
the last time the jets were in the super bowl was 42 years ago
The Green Bay Packers won what were retrospectively named Super Bowl I and II, but then they were named the NFL-AFL championship game. The NY Jets were the first team to win a Super Bowl when it was called the Super Bowl.
Super Bowl 3 - January 12, 1969They defeated the Baltimore Colts 16-7.http://en.wikipedia.org/wiki/List_of_Super_Bowl_champions
They have only won once in Super Bowl 3 in 1969
Once in 1969.