Simon Gagne added his 23rd goal, an empty-netter with a second left.
Biron was kept busy, though not seriously threatened, in his second shutout of the season. The Kings took only nine shots in the third period, failed to convert on five power plays and suffered another hit in their chase for the eighth seed in the West.
There was little drama or action for most of this one, with Carter's power-play goal late in the second period about the only reason for fans to get on their feet all game.
No big fights, no controversial penalties that drew the fans' ire, no real breakaways stopped with the snap of a mitt.
When Flyers enforcer Riley Cote checked winger Brad Richardson into the corner boards 5½ minutes into the second period, the crowd came alive and really roared for the first time.
Carter really gave the Philadelphia faithful a reason to make some noise toward the end of the period.
Joffrey Lupul's shot in front of Erik Ersberg appeared to bounce of the goalie's shoulder, hit the post and skid out toward Carter.
Two defenseman and Lupul were in the crease, and Carter found a puck-sized hole between the four of them. With the power-play goal, he snapped a tie with New Jersey's Zach Parise for second place in the NHL goal race - eight behind Washington's Alex Ovechkin.
Carter ended a season-worst five-game goal drought when he scored a night earlier in Philadelphia's 4-2 comeback win at Washington.
The goal held up for the Flyers, who beat their former coach, Terry Murray. Murray led the Flyers to the 1997 Stanley Cup finals, and spent the past four seasons with them as an assistant coach.
Ersberg hasn't won for the Kings since Dec. 13 against Minnesota.
Notes: The Flyers played without defenseman Kimmo Timonen (flu). ... Former Flyers goalie and team Hall of Famer Ron Hextall received a huge ovation from the crowd in the third period. He is the Kings' assistant GM. ... Flyers C Danny Briere (groin) hopes to return from a 35-game absence against Montreal on Friday night.
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