That gave the Flyers their fourth straight win and moved them within one point of the sixth-place Rangers in the Eastern Conference playoff race.
Danny Briere scored his 30th goal 7:32 into the third period to tie it. The Rangers tried to protect a 1-0 lead they earned just 1:41 in when Jaromir Jagr hit the 20-goal mark for the 17th straight season.
Martin Biron made 31 saves in the victory. Lundqvist finished with 23.
The Rangers played for the first time this season without leading scorer Scott Gomez, who injured his ribs early in Friday's shootout loss at Philadelphia. He is day to day.
New York's offense that had scored 10 times in three games sure could've used the center's playmaking. Again the Rangers got nothing from its power play that failed on four chances and has clicked for a goal only once in 29 chances over nine games.
Jagr's goal looked as though it might stand up as New York held the Flyers to only 12 shots through two periods.
Even Philadelphia's No. 2 ranked power play couldn't generate much. The Rangers killed off Colton Orr's roughing penalty early in the third, making the Flyers 0-for-3 with the advantage, but they couldn't stop a pretty passing play at even strength that produced the tying goal.
Jaroslav Modry kept the puck in at the left point and slid a pass down to Briere, who moved the puck to Vaclav Prospal in the middle. Prospal quickly sent a pass back to Briere for the goal.
The Flyers' big free-agent pickup hit the 30-goal mark for the second straight season, third overall.
Early on, Jagr outworked defenseman Kimmo Timonen and dug out the puck off the end boards to the left of Biron. He moved to the bottom of the right circle and quickly snapped a shot that beat Biron at 1:41.
It was Jagr's second goal in three games, following a 24-game stretch in which the Rangers captain scored only three times. Jagr has scored in consecutive games just four times this season - including two three-game streaks.
