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44 miles, round figures.
Oakland, San Francisco and Sacramento airports are all equidistant from Napa, but the easiest airport to get into / out of by far is Sacramento.
611 miles
It is 60.3 miles according to Google Maps.
Sonoma County Airport in Santa Rosa Closest major airport is Oakland.
If you mean Newport Beach, California, the approximate distance from Oakland, California to Newport Beach, California is about 486 miles.
6 hrs 55 mins / 432.65 miles
453 miles
How far is it from Fresno, CAlifornia to Napa Valley, CAlifornia
~64 miles to the center of Napa Valley
~64 miles to the center of Napa Valley
635 miles