Each week the NHL selects three stars of the week. Duchene and Fleischmann were joined by Carolina's Eric Staal for honors for games played Dec. 13-19.
Colorado moved to the top of the Northwest Division in a week in which Duchene and Fleischmann combined for eight goals and six assists in four games. The Avalanche have won six consecutive games.
Duchene had two game-winning goals, including one in overtime Friday to beat Ottawa. Fleischmann, who joined Colorado Nov. 30 after a trade with Washington, got his first hat trick with three goals in the third period of a 4-3 win Wednesday at Chicago.
Staal had four goals last week. Three of those came when he recorded his 12th career hat trick.