Brock Nelson scored at 1:24 of overtime to lift the New York Islanders past the host Philadelphia Flyers 4-3 on Monday.

Nelson capitalized following a turnover by Morgan Frost in the Flyers’ zone. Frost had forced overtime with a goal in the final seconds of regulation.

Matt Martin, Bo Horvat and Anders Lee each scored for the Islanders (32-27-15, 79 points). Semyon Varlamov made 30 saves.

Noah Cates and Travis Sanheim also tallied for the Flyers (36-29-11, 83 points), who have lost five in a row.

Flyers goaltender Samuel Ersson allowed two goals in the first period and Ivan Fedotov made his debut by starting the second period. Fedotov stopped 19 shots.

Owen Tippett and Frost each had strong scoring chances early in the third period as Varlamov was able to cover the puck at 5:36. New York’s Kyle MacLean took a shot just over the crossbar at 14:02.

Fedotov was pulled for an extra skater at 16:25 and Travis Konecny nearly tied the game at 18:50 with a laser from the point. The Flyers stayed aggressive and equalized at 3 with 9.6 seconds remaining when Frost pounced on a rebound and scored.

The Flyers went ahead 1-0 when Cates connected on an unassisted goal at 4:57 of the first period.

Martin equalized with a rare goal for the Islanders at 12:03. It was just the second goal in 31 games for Martin, whose shot ricocheted off Erik Johnson’s skate.

Just 18 seconds later, Horvat fired a slap shot for a 2-1 New York advantage. Before the Islanders skated up the ice, Flyers captain Sean Couturier took a hard hit from Ryan Pulock into the boards and went to the locker room appearing to hold his right shoulder. Couturier was unable to return.

Sanheim skated the length of the ice and fired a shot past Varlamov just 43 seconds into the second period to tie the game at 2.

Mathew Barzal broke free all alone and had a point-blank shot saved by Fedotov at 4:55.

New York regained a 3-2 lead at 17:54 when Lee redirected Alexander Romanov’s shot in front.