Ligety, the defending World Cup giant-slalom champion, took bronze on the same course in 2009 at the world championships.
"It's certainly nice to get two races in a row," Ligety said. "It's definitely pretty exciting to be able to do that in such difficult conditions."
Ligety claimed his seventh World Cup victory on the steep course, regarded as one of the most difficult on the circuit. All seven of his World Cup wins have come in GS races.
Most of the competitors struggled, with 20 skiers failing to finish the first run.
Bode Miller, of the United States, skied out after just a few gates in the morning run, while local favorite Jean-Baptiste Grange, of France, also was eliminated when he went out after three gates.
Davis wins World Cup speedskating meet
Americans swept the 1,000-meter races at the World Cup speedskating meet Saturday, with Shani Davis capturing the men's event and Heather Richardson taking the women's race.
Davis, the Olympic gold medalist, clocked 1 minute, 9.56 seconds to finish 0.24 seconds ahead of South Korea's Lee Kyou-hyuk.
Park City women go 2-3 in ski jumping
Sarah Hendrickson, of Park City, and world champion Lindsey Van, also of Park City, went two-three as the U.S. ski jumping women continued to put on another dazzling performance Saturday in a Continental Cup event on the fabled jumping hill in Vikersund, Norway. Austrian Daniela Iraschko won the event with a second-round long jump of 119.5 meters. Hendrickson took second with jumps of 112.5 and 115.0 meters, with third going to Van with leaps of 109.5 and 116.6.