Halpern broke a 1-1 tie 2:18 into the third, Gionta put the Canadiens ahead by two goals midway through the period, and Hamrlik closed the scoring with 3:32 left. Michael Cammalleri added a power-play goal in the first for Montreal.

The Canadiens are 8-1-1 at home since a 3-2 loss to the Senators on Nov. 6.

Ottawa’s Nick Foligno scored a power-play goal late in the first period, but the Senators fell to 3-7-1 in their last 11.

Halpern put the Canadiens ahead for good when he drove the right side and held the puck until goalie Pascal Leclaire sprawled to the ice. He then scored his sixth goal into an open side.

Gionta netted his ninth off a 2-on-1 rush with Andrei Kostitsyn to make it 3-1 at 10:01.

Hamrlik scored during four-on-four play when he batted in a puck above the head of goalie Brian Elliott, who got a glove on Gionta’s shot — the first drive he faced after replacing Leclaire.

Leclaire, who left the game briefly with 4:22 remaining in the third, made 30 saves. Elliott stopped one of two shots he faced in the 2:28 he played before Leclaire returned.

Ducks 3, Oilers 2 — Cam Fowler’s goal in the 10th round of a shootout lifted Anaheim over host Edmonton after blowing a two-goal lead in the third period.

The Ducks had a chance to win the shootout in every round after the first, but couldn’t score until Fowler got a shot past Nikolai Khabibulin. The defenseman, in his 24th NHL game, turned 19 Sunday.

Saku Koivu and Teemu Selanne scored in regulation for the Ducks, who had been shut out in their two previous games and had lost eight of 11.

Ryan Jones and Dustin Penner rallied the Oilers, whose four-game winning streak ended.

Flames 4, Lightning 2 — Rene Bourque had a goal and two assists in Calgary’s home victory over Tampa Bay.

Cory Sarich, Tom Kostopoulos, and Jarome Iginla also scored for the Flames.

Johan Harju and Ryan Malone had goals for the Lightning, who beat Colorado, 6-5, at home on Saturday.

Lightning forward Steven Stamkos was held without a goal for the sixth straight game. He scored 21 goals in his first 22 games. Stamkos has also gone three games without a point.

Panthers 4, Avalanche 3 — Stephen Weiss scored his second goal of the game 43 seconds into overtime to give Florida a victory over visiting Colorado.

Bill Thomas and David Booth also had goals for the Panthers, who have won two straight following a three-game losing streak. Tomas Vokoun made 22 saves.

John-Michael Liles, Ryan O’Reilly, and Matt Duchene scored for the Avalanche, who have lost four in a row.

Craig Anderson, who served as Vokoun’s backup for four seasons before signing with Colorado last offseason, made 21 saves.

Weiss gave Florida the victory with a spectacular goal. Anderson stopped Booth’s shot from the wing, and Weiss was hooked after he got the rebound. He scored the winner while falling to the ice.