Detroit (31-32-9), which was 0-for-7 on the power play, is 3-11-1 in its past 15 games. Alex Nedeljkovic made 19 saves in his first start since Dec. 8.
"Our inability to execute on the power play was the difference for us tonight," Red Wings coach Derek Lalonde said. "You get that many looks and to not generate a goal, that was the difference."
Philadelphia is 10-for-10 on the penalty kill in its past two games after allowing at least one power-play goal in its previous seven games.
Flyers coach John Tortorella credited assistant Brad Shaw with a recent adjustment to have the penalty kill be more aggressive.
"We're chasing more, not letting them get set up," Tortorella said. "Have an attitude of not letting them set up. For a while we just relied on blocking shots and staying in lanes and not putting them under pressure. I think we've moved in unison and pressure all day long killing penalties."
Philadelphia has also worked in new players on the penalty kill, including forwards Frost, Owen Tippett and Brendan Lemieux.
"I think it's still a work in progress," Laughton said. "I think a lot of our penalty killers are out, so we've got some new personnel learning on the fly and trying to be a little bit more aggressive.
"I think once we get into our structure it's pretty passive, but not letting them enter the zone as much. And as soon as it gets on the yellow or around the wall, we try and pressure as much as we can. I think that's probably helped us out a little bit. Didn't let them get set up too much at all tonight."
Bellows put the Flyers ahead 1-0 at 10:10 of the second period. Tippett's shot from the slot was stopped by Nedeljkovic, but Bellows drove to the net and chipped in the rebound.