Bunting scored his third of the game at 8:48 of the second period on a power play to give Arizona a 4-1 lead. The 25-year-old forward has scored five points (four goals, one assist) in nine NHL games.
"I felt good," Bunting said. "More and more games I get in, the more comfortable I can be with my game, and I felt it tonight. The puck was on my stick, and I was moving it well. … You've just kind of got to get open and bury it when you get those chances, and luckily I was able to."
Adin Hill made 36 saves for the Coyotes (19-15-5), who were 3-for-6 on the power play and won their third straight game. It was the second of back-to-back games following a 3-2 overtime victory at the Anaheim Ducks on Sunday.
Drew Doughty scored a power-play goal for the Kings (14-17-6), who have lost three in a row and six of their past seven games. Cal Petersen made 28 saves but allowed three goals in the first 7:28.