The four-times overall World Cup winner, who pipped Sofia Goggia by two hundredths of a second in Saturday's sprint downhill at Garmisch, again edged the Italian in Sunday's conventional race on the Kandahar mountain, this time by 0.11 seconds. Tina Weirather of Liechteinstein was third.
The U.S. team also had a scare, one day after Jacqueline Wiles crashed and was ruled out of this month's games in Pyeongchang after fracturing her fibula and tibia and suffering a torn anterior cruciate ligament.
This time, Stacy Cook fell at over 100 kilometres per hour, crashing dramatically into the safety netting, but staggered to her feet after a few tense minutes and brushed herself down.
There was no immediate comment on her condition from the U.S. skiing federation.
Laurenne Ross, another American who crashed on Saturday but emerged unscathed, completed the course but was nearly two seconds slower than Vonn's time.
It was Vonn's fourth win of the World Cup season and her third in a row in the downhill.
The 33-year-old, the finest woman skier of her generation, won the downhill gold at the Vancouver games in 2010 but missed Sochi four years ago through injury.
She suffered an 11-month layoff after suffering a knee injury in Andorra in February 2016 and then broke her arm in training in Colorado the following November, requiring an intensive programme of rehabilitation.
She was also left with lingering nerve damage.
(Writing by Brian Homewood in Bern; Editing by Toby Davis)
