Lewis set up Dwight King's go-ahead score on a deflection then got his first goal of the season on a short-handed wraparound, capitalizing on goalie Jaroslav Halak's stick-handling goof.
Jonathan Quick had 28 saves as the Kings snapped a five-game road losing streak in the opener of a five-game trip.
T.J. Oshie scored his first career goal on a penalty shot in the second period for the Blues, who snapped a five-game home winning streak. Oshie has 11 goals on the season and has five goals and four assists in his last six home games.
He's a winner. We want winners here, and he's a proven winner. He's won two Stanley Cups. He's 22 years old and been a big part of it. He's got all the right tools. He's got size (6-foot-1, 204 pounds) and strength. He's exactly what we were looking for. He's going to be a big piece of our team for many, many years to come.
— Blue Jackets GM Jarmo Kekalainen on Brandon Saad, who he acquired in a trade with the Blackhawks on Tuesday