Perreault, Corey Perry and Nick Bonino scored power-play goals for the NHL-leading Ducks, who improved to 18-0-2 at home.
Andrew Cogliano scored short-handed during the Ducks' three-goal second period. Ryan Getzlaf and Teemu Selanne added two assists apiece in Anaheim's eighth consecutive win at Honda Center, matching its 8-0 streak to open the season.
There's not much to say. We played like [garbage]. I think every guy in the room should be completely embarrassed about how they played tonight. Every single person. To start a road trip, one of the biggest road trips and have a division rival chasing you down and have a ton on the line, it's ridiculous how we played tonight.
— Anaheim forward Andrew Cogliano after the Ducks' 7-2 loss to the Flames on Wednesday