There was only one goal needed in the third period, as the Capitals grabbed the lead with 10:41 to play and held on from there in a 4-1 decision over the Flyers aided by two empty-net goals.
The Flyers have won two of four games on the current five-game homestand. The Capitals come to town for the final game of the homestand on Wednesday night.
The Flyers are locked in a seven-game losing streak entering Wednesday's game. But it's been nearly as much of a struggle for the Capitals, who enter the game on a four-game losing streak of their own.