Morrissey, who returned after missing two games because of a lower-body injury, extended the lead to 2-0, scoring on a shot from the point on the power play at 14:36.
Voracek pulled the Flyers to within 2-1 when he scored on a deflection at 17:34.
"They came with a great effort in the first period," Morrissey said. "Although we were up 2-1 we didn't love our first as a whole, but usually you're not going to dominate an entire 60 minutes, so when they had their push [Hellebuyck] made some big saves, really some huge saves actually, and kept us right there. And then we got going in the second and third. Like I said, it was a big win for us."
Brandon Tanev restored Winnipeg's two-goal lead when he scored on the rebound of a Morrissey shot at 7:31 of the second period.
"We had a great start and we were all over them and their goalie made a couple big saves," Neuvirth said.
Dustin Byfuglien made it 4-1 on the power play at 14:31, and Blake Wheeler made it 5-1 on a shorthanded breakaway at 15:59, giving him 15 shorthanded points in his NHL career, a Jets/Atlanta Thrashers record. Marian Hossa and Eric Perrin each had 14.