Nick Jensen extended the lead to 3-1 at 4:15 of the third period on a rush. It was his first goal since Oct. 11, 2018.
"It started with [Zdeno] Chara making a great defensive play on the blue line and then he took two guys out of the play with some physicality," Jensen said. "That allowed me to get up in the play and then from there, [Nicklas] Backstrom is a playmaker, he made plays and then just hit me wide open and I had it all day to take a shot."
Samsonov, who was making his second start since being on the NHL COVID-19 protocol list from Jan. 20-Feb. 7, made 15 saves in the third to preserve the victory.
"I thought he played great for us," Carlson said. "There was plenty of big saves that he made throughout the game when I thought we were working real hard, working good and kind of bringing it to them, and they would turn it around with one or two chances here or there and he was huge down the stretch for us."
Farabee gave the Flyers a 1-0 lead at 11:04 of the first period when he finished a 2-on-1 rush with James van Riemsdyk.
Philadelphia was 0-for-4 on the power play, including three chances between Farabee's goal and Ovechkin's goal in the second, and is 5-for-40 (12.5 percent) with the man-advantage in its past 10 games.
"We need to score one eventually and get the killer instinct of taking over the game," Flyers forward Sean Couturier said. "Power play, you can win games, and penalty kill, you can lose them, and right now we're losing that kind of battle, that aspect of the game."
NOTES:Washington played without forward Tom Wilson, who served the first of a seven-game suspension from the NHL Department of Player Safety for boarding Boston Bruins defenseman Brandon Carlo on Friday. ... The Flyers have lost consecutive games in regulation for the first time since losing three straight from Dec. 31, 2019 to Jan. 4, 2020.