The Philadelphia Flyers have had many rivalries over the years, but some opponents stand out as particularly disliked by Flyers fans. Here are some of the most hated opponents of the Philadelphia Flyers:

1. Pittsburgh Penguins: The Flyers and the Penguins have a long-standing rivalry that dates back to the 1980s. The two teams have met in the playoffs several times, and the intensity of their matchups often spills over into on-ice fights and scrums.
2. New York Rangers: The Flyers and the Rangers have a historic rivalry that goes back to the early days of the NHL. The two teams have faced off in several memorable playoff series, including the “Battle of the Broads” in 1974.
3. New Jersey Devils: The Flyers and the Devils have a heated rivalry that developed in the 1990s. The two teams have met in the playoffs several times, and the intensity of their matchups often leads to physical play and hard hits.
4. Boston Bruins: The Flyers and the Bruins have a longstanding rivalry that dates back to the early days of the NHL. The two teams have met in several memorable playoff series, including the 2010 Eastern Conference semifinals, in which the Flyers overcame a 3-0 series deficit to win in seven games.
5. Washington Capitals: The Flyers and the Capitals have a recent rivalry that developed in the 2010s. The two teams have met in several memorable playoff series, including the 2016 first-round matchup that saw the Flyers eliminate the Capitals in six games.
6. Montreal Canadiens: The Flyers and the Canadiens have a historic rivalry that goes back to the 1970s. The two teams faced off in several memorable playoff series, including the 1976 Stanley Cup Finals, in which the Canadiens defeated the Flyers in four games.
7. New York Islanders: The Flyers and the Islanders have a heated rivalry that developed in the 1980s. The two teams faced off in several memorable playoff series, including the 1980 Stanley Cup Finals, in which the Islanders defeated the Flyers in six games.

These are just a few of the most hated opponents of the Philadelphia Flyers. The intensity of the team’s rivalries has helped to make the Flyers one of the most passionate and beloved teams in the NHL.