Dufour-Lapointe's first international success came at the 2011 World Championships. There in the dual moguls event she advanced to the final against teammate and idol, Jennifer Heil. Dufour-Lapointe lost the race but walked away with the silver medal. Heil had nothing but kind words to say for the rising star however, saying that "It was so cool to go against Chloe in the final. She's the next generation and she'll be here for a long time with such a bright future. My last run down the hill at a world championships, it's really amazing to ski against her."