Carey Price stopped 23 shots for his third 0 decision over the Winnipeg Jets.
"I thought our guys played with a lot of hunger and a lot of grit tonight," said Price. "We had a good forecheck and did a great job of pounding their defensemen. That's why we kept the momentum throughout most of the game."
Ondrej Pavelec was tagged for all three goals on 23 shots for the Jets, who have dropped two straight.
"We started the game well but I thought they took their game up and ours went down," said Winnipeg head coach Claude Noel. "We didn't do a lot of things well through two periods. We lost a lot of battles and looked mentally fatigued."
With under two minutes to play in the first, the Canadiens took a 1-0 lead as a shot by Yannick Weber from the right point was stopped by Pavelec, but Pacioretty shoveled in the rebound for his 19th of the season.
At the 7:20 mark of the second, while shorthanded, Plekanec skated into the Winnipeg end down the right wing and shoveled it over to the slot where Emelin was all alone for the redirect.
On the power play, the Habs took a 3-0 lead when Plekanec got the puck in the high slot and skated closer to the net before snapping a wrister past Pavelec for his 11th of the season at the 11:28 mark of the second.
Price stopped 15 shots in the first two periods then turned aside eight in the third for his 15th career shutout.
Montreal hosts Pittsburgh on Tuesday...Winnipeg, which went 2-4-0 on its six- game road trip, returns home to face Toronto on Tuesday...It was the final game this season between these two teams. Montreal won three of four, including both home games.