Aube-Kubel was scheduled for restricted free agency this offseason.
The 24-year-old was drafted by the Flyers in the second round of the 2014 draft. He established a role in Philadelphia's offense this season, recording 15 points in 36 regular-season games before adding three more in 12 playoff contests.
The Flyers have a projected $7.8 million in available cap space with Aube-Kumel signed. Defensemen Philippe Myers and Robert Hagg, as well as 2017 second overall pick Nolan Patrick, are also due new contracts as RFAs.