The first professional ballet company in the United States, San Francisco Ballet is possibly the most highly regarded performance group in the area.
The repertory season opens with the annual Nutcracker runs until May-ish with primarily classic performances with more contemporary performances :)
Discounted same-day tickets are available to students/military/seniors for shows that are not sold out. Season tickets start at $144. Otherwise, the company performs annually (for free!) at the Stern Grove Festival.
The Opera performs in the same building, and the Symphony is across the street.
Address: 301 Van Ness Ave, SF
Website: http://sfballet.org