The third line of Rutger McGroarty, Lars Eller, and Jesse Puljujarvi combined for four even-strength goals and 10 points.
The Red Wings dressed many of their veterans on Friday night while Ottawa took a last look at some of the players fighting for NHL jobs.
Backed by an impressive power play and scoring from the top line, the New York Islanders won their final preseason game, beating the cross-town rival New York Rangers 5-2 on Friday night.
Unless the team's decision-makers pull a last-minute audible, all indications point to Jett Luchanko, at 18 years old, playing for the Flyers on opening night.