William Flynn is an American former ice hockey player. He won two national championships with Boston University before embarking on a professional career in various German leagues.

Flynn debuted as a varsity player on Boston University in the fall of 1970. While he was a depth player and only provided 3 assists in his first season, he had arrived just in time to be part of the Terriers' first national championship team.^[1] While he tripled his point total in year two, Flynn remained a role player for the team as it won the NCAA championship once more.

He left BU after the two titles and signed a professional contract with the Port Huron Wings. His scoring remained modest but he proved to be a solid defensive player, enabling him to continue his career the following year with the Dayton Gems. Flynn saw a significant jump in his offensive production with the Gems but he had few opportunities to move up in the North American leagues so he traveled across the Atlantic in 1974.

SG Nürnberg was Flynn's first stop and he immediately became a star play for the team. He averaged more than a goal per game and performed so well that he earned a contract with EV Füssen of the top German league. His stay there was brief as Flynn signed up to play with RSC Bremerhaven. He helped the club earn a promotion to the 2nd Bundesliga in 1978 and remained with the club until 1981. He spent his final two years between three teams before retiring as a player in 1983.