The 2003–04 Philadelphia Flyers season was the Flyers' 37th season in the National Hockey League (NHL). The Flyers reached the Eastern Conference Finals but lost in seven games to the Tampa Bay Lightning.

Regular season

Free-agent goaltender Jeff Hackett was signed from the Boston Bruins to replace Roman Cechmanek and challenge backup Robert Esche for the number one spot in 2003–04, but Hackett was forced to retire in February due to vertigo. During the course of the season, serious injuries suffered by both Jeremy Roenick (broken jaw) and Keith Primeau (concussion) in February forced the Flyers to trade for the Chicago Blackhawks' Alexei Zhamnov, who filled in well and kept the Flyers afloat. Esche entrenched himself as starter and remained in that position even after the Flyers re-acquired Sean Burke from the Phoenix Coyotes, as the Flyers clinched the Atlantic Division title over the New Jersey Devils on the last day of the season.

Season standings

Playoffs

Though solid in net, Esche's performance was over-shadowed by the play of captain Keith Primeau in the playoffs. Primeau led the Flyers past the defending Stanley Cup champion Devils in five, and the Toronto Maple Leafs in six on their way to the Eastern Conference Finals and a match-up with the Tampa Bay Lightning. Despite winning Game 6 on the late-game heroics of Primeau and winger Simon Gagne, the Flyers would come up short once again losing Game 7 in Tampa, 2–1.

Schedule and results

Preseason

Regular season

Playoffs

Player statistics

Scoring

Goaltending

Awards and records

Awards

Records

The March 5, 2004 game against the Ottawa Senators set four NHL records. The Flyers set the records for most penalty minutes in a game (213) and most penalty minutes in a period (209). Likewise, both teams penalty minute totals set the combined game (419) and period (409) records. The Flyers 32 penalties during the third period set a franchise record.

Milestones

Transactions

The Flyers were involved in the following transactions from June 10, 2003, the day after the deciding game of the 2003 Stanley Cup Finals, through June 7, 2004, the day of the deciding game of the 2004 Stanley Cup Finals.

Trades

Players acquired

Players lost

Signings

Draft picks

Philadelphia's picks at the 2003 NHL entry draft, which was held at the Gaylord Entertainment Center in Nashville, Tennessee, on June 21–22, 2003. The Flyers traded their originally allotted second, fourth, fifth, seventh, eighth, and ninth-round draft picks in five different trades.

Farm teams

The Flyers were affiliated with the Philadelphia Phantoms of the AHL and the Trenton Titans of the ECHL.