The Ottawa Senators are now winless in three games on their current road trip after dropping a 6-3 game in Los Angeles on Thursday.
Drew Doughty snapped a 3-3 tie late in the second with a power-play goal for the Kings, and Justin Williams added two goals with less than three minutes remaining in the third.
Ottawa is 0-2-1 on the current trip, which concludes with games on consecutive nights against Phoenix and Anaheim, beginning Saturday.
"I think that at times we beat ourselves," coach Cory Clouston told reporters. "We made a couple of mistakes, a couple of penalties that were unnecessary and they jumped on their chances."
All told, the Senators have lost six straight away on the road. The club last won away from Scotiabank Place on Oct. 28 against Florida.
Mike Fisher had two goals for the Senators on Thursday, with Jonathan Cheechoo also scoring for Ottawa (13-9-4).
Brian Elliott had 18 saves as the Senators battled out of early penalty trouble but could not sustain a 60-minute effort.
"Brian needs to be better," said Clouston. "We needed a couple of saves and to me that was the difference tonight."
"He's fighting the puck right now … he's got to find a way to battle through it," the coach added.
Ottawa got off to a terrible start, with Los Angeles quickly moving the puck up the ice to score just 42 seconds into the game.
Alexander Frolov skated down the left wing and fed a drop pass to Randy Jones, who picked the top corner over the glove of Elliott.
Fisher gave an indication of his motivation level early on with the two best Ottawa chances.
Kings netminder Jon Quick saved those, but Fisher put the Senators on the board with a power-play goal at 11:13. Ryan Shannon, working the point for Ottawa, was on target with a shot Fisher could deflect.
Los Angeles forward Wayne Simmonds was upended at an angle by Filip Kuba with just over two minutes left in the first, leading to a debatable penalty shot call.
Simmonds made no mistake on his free shot, beating Elliott to the glove for his fourth goal in the last five games.
The Senators dug themselves a big hole when Chris Kelly, Daniel Alfredsson and Anton Volchenkov took minor penalties in a 51-second span late in the first.
The Kings squandered the consecutive 5-on-3 power plays early in the second, spraying several shots wide of the mark.
Teams usually benefit after killing off such penalties but it was Los Angeles who scored next, not Ottawa.
Dustin Brown outfought Kuba to the puck and got a clean shot off, with Brad Richardson swooping in for the rebound goal at 3:51.
Cheechoo helped cause a Los Angeles penalty to give Ottawa a bit of momentum. The Senators didn't score on that particular man advantage, but soon after, Cheechoo notched his third of the season.
Frolov coughed the puck up in his own end, with Cheechoo potting a rebound from Chris Kelly's shot for his first goal in seven games.
The Kings endured a dreadful shift just past the midway point of the period as the visitors tied the game.
Star forward Anze Kopitar was drilled into the boards in the Ottawa end, and the Senators cashed in at the other end on Fisher's 12th.
Kopitar returned and was on the ice as Los Angeles took just six seconds to strike with Chris Phillips in the box for interference later in the period.
Jarret Stoll won a faceoff and Brown screened Elliott to help pave the way for Doughty's slapshot goal from the bottom of the left circle.
Los Angeles had an odd-man rush late in the frame but Williams couldn't get a shot on net.
"I thought the second period we had a lot of momentum and we were playing well and playing hard and the fourth goal seemed to break our backs," said Clouston.
The Kings went into shutdown mode in the third. At one point, they were being outshot 8-3 in the period but they yielded few great scoring chances.
Frolov helped end the suspense, forcing Ottawa defenceman Matt Carkner to turn the puck over right to Williams. The Kings forward netted his seventh at the 17:37 mark and added another on a scramble with just 10 seconds remaining.
Senators coach Cory Clouston made Nick Foligno a healthy scratch for the game but may want to reconsider on the weekend. Peter Regin and Ryan Keller played few minutes and had little impact.
Alex Kovalev assisted on the second Fisher score but is now without a goal in 12 games.

