Which service will you likely use?
An uberX car can pick you up in ~2 min.
Distance between The Westin Verasa Napa and Opus One Winery is approx. 13.12 miles (21.11 km) with 20 min travel time.
This Uber estimate from The Westin Verasa Napa to Opus One Winery
768 days ago.
Update the estimate to see the real-time fare prices with Uber in Napa.