The Flyers hold the second wild card into the Stanley Cup Playoffs from the Eastern Conference and can pull even with the New Jersey Devils and Columbus Blue Jackets for third place in the Metropolitan Division. Each team would have 58 points, with the Devils having a game in hand.
Philadelphia won 2-1 in overtime at Washington on Jan. 21 and 8-2 at Wells Fargo Center on Oct. 14.
The Capitals have lost four of their past six games (2-2-2), including three in a row at home, but are still first in the division, four points ahead of the Pittsburgh Penguins.