Boucher outdueled New Jersey's Martin Brodeur to register his first playoff win since the 2000 Stanley Cup semifinals, also against the Devils. New Jersey won that series after the Flyers had posted a 3-games-to-1 lead.
Mike Richards and Chris Pronger got the goals for the seventh-seeded Flyers, who continued their good showings against the Devils this year. Philadelphia went 5-1 against New Jersey in the regular season.
Travis Zajac notched the lone goal for the Devils, ruining Boucher's shutout bid with 2:43 to play in the game.
Brodeur faced only 14 shots, making 12 saves in the loss as New Jersey seeks to avoid being eliminated in the first round for the third straight year.
Game 2 of the series is set for Friday in New Jersey.