Dmitry Orlov scored for the Sharks (32-30-6), who have lost four straight. Nedeljkovic made 24 saves, and Macklin Celebrini had an assist.
San Jose is three points behind the Nashville Predators for the second wild card from the Western Conference.
"It's not so much someone, we just need more guys going. We need more guys going throughout our games," Sharks coach Ryan Warsofsky said. "With this time of year, you need your full bench going. You've got to fight for every inch."
Tippett put the Flyers in front 1-0 at 2:26 of the second period. Trevor Zegras' pass deflected off Nick Leddy at the left point, and Tippett toe-dragged around the Sharks defenseman before putting a wrist shot by Nedeljkovic’s glove.
"I like where my game is at right now. Consistent all the way through, contributing," Tippett said. "It is easy to do when everyone is doing it around you, too."