Flyers general manager Paul Holmgren announced the extension Wednesday. Terms of the deal were not disclosed.
Laviolette has compiled a 122-73-26 record since taking over for John Stevens in December 2009. He led the Flyers to an appearance in the Stanley Cup finals that season after Philadelphia bested Boston in the conference semifinals despite losing the first three games of the series.
The Flyers collected 47 wins in each of the last two seasons only to be knocked out in the Eastern Conference semifinals, most recently by the New Jersey Devils.
Holmgren says Laviolette has done "a terrific job" to earn the extension.
Obviously a lot happened in a short period of time. At the end of the day, considering everything I went through, I really felt close to my teammates and I really feel like what we accomplished, I know we didn't win it all. ... I'm really proud of how we got there and what we did once we got there.
— Rangers forward Martin St. Louis to Jim Cerny of BlueshirtsUnited.com