The goal extended Voracek's point streak to seven games (three goals, seven assists).
The penalty was Plekanec's third of the game, and the Canadiens gave the Flyers four power plays.
"Those penalties hurt us," Montreal coach Claude Julien said. "Their power play seemed to be going well tonight, and our penalty kill wasn't good enough. … Five-on-5 we were good, we competed with them, we had some chances. But those penalties ended up costing us there at the end."
Konecny made it 4-2 with his second of the night when he found the puck after it trickled through Price's pads and poked it over the goal line at 1:28. He has nine goals in the past 15 games after he had four in the first 39.