The Bruins have won nine straight road games, a single-season club record.
Reilly Smith, the fifth Boston shooter, clinched the victory in the tiebreaker. The Bruins went 15-1-1 in March.
Vincent Lecavalier scored twice for the Flyers, including the tying goal with 25 seconds left in regulation. Lecavalier's first goal was the 400th of his career.
Kimmo Timonen scored for Philadelphia, which has lost three of four to remain in third place in the Metropolitan Division.
RED WINGS 3, LIGHTNING 2
DETROIT (AP) — David Legwand had a goal and an assist, and Detroit held off Tampa Bay to move into seventh place in the Eastern Conference.
Legwand assisted on Nyquist's goal that gave Detroit a 2-1 lead with 4:36 remaining in the first. He made it 3-1 on a power-play score with 3:24 left in the second period, tipping in Johan Franzen's shot for his 13th goal.
SENATORS 6, FLAMES 3
Jared Cowen gave Ottawa a lift with a tiebreaking goal on a wrist shot 1:12 into the third period, and Clarke MacArthur made it 5-3 with a tip-in at 12:22. Turris then scored his 25th goal into an empty net.
Robin Lehner made 37 saves as the Senators won back-to-back games on home ice for the first time since they won three straight in late December and early January.