The American, twice an Olympic champion and looking to win the overall World Cup title for the third time in a row, won her second race of the campaign after also winning the slalom in Levi in Finland.

She has now won the Killington slalom for three consecutive years and clocked 1min 43.25sec after her two runs today.

Shiffrin's 52.49sec was the quickest of the first descents and her 50.76 was second best when the skiers took to the course again.

Fog and mist made conditions tricky but 15,000 fans still lined the slopes.

"You guys, I could hear you from the start," said Shiffrin. 

"That was the most unbelievable thing I've ever experienced, so thank you."

Slovakia's Petra Vlhová won the silver medal in 1:43.82 with bronze going to Frida Hansdotter of Sweden in 1:44.33.

Norway's Kristin Lysdahl clocked the quickest second run of 50.74 but was only 27th-fastest first time around, finishing 16th.

In men's action, Norway's Kjetil Jansrud won the super-G at Lake Louise in Canada.

The Sochi 2014 champion in the discipline came home in 1.33.52 to ensure a Norwegian won the event for the seventh-straight year.

Vincent Kreichmayr of Austria was second in 1:33.66 and Mauro Caviezel of Switzerland took the bronze medal in 1:33.73.

The women's season is now due to head to Lake Louise from November 30, with the men travelling to Beaver Creek in the US from the same date.