Atkinson scored on a shorthanded breakaway for a 3-1 lead at 9:06 of the third.
"'Quickie,' I've known him for a long time, and he knows my moves," Atkinson said. "He made the initial stop. His momentum, his arm was going back into the net, the puck was there, and I just stopped and pounded it home."
Arvidsson made it 3-2 with a power-play goal at 9:51 when Arthur Kaliyev's shot deflected off his shin pads. It was his fourth goal in two games against the Flyers; he scored twice in a 6-3 win at Los Angeles on Jan. 1.
"I think they were a little bit faster and more detailed than us in the first and then I think we got it going in the second," Arvidsson said. "I think the third was a tight period. We had a lot of chances."
NOTES:Philadelphia's skid was the longest by an NHL team since the Buffalo Sabres went 18 games (0-15-3) from Feb. 25-March 29, 2021. The Flyers went 12 straight without a win from Feb. 24-March 16, 1999 (0-8-4 ties)....Kings defensemen Mikey Anderson was placed on injured reserve Sunday, retroactive to Saturday. He missed the final two periods with an upper-body injury. "Didn't finish the game, so not a good sign," McLellan said. "Took a puck around the head area, I think was the cause. We'll have to see how he is." ... Los Angeles defenseman Drew Doughty played a season-high 30:24 and had three shots on goal. ... Flyers forward Isaac Ratcliffe had three shots on goal and four hits in 9:02 of ice time in his NHL debut. ... Atkinson has scored six points (two goals, four assists) in two games against the Kings this season. He had three assists Jan. 1.