Seen below, we found seats on United departing San Diego SAN on Thursday, February 8, returning from Shanghai PVG on Sunday, February 18.
Other dates are also available for travel throughout the year, with departures from the USA through May 3 and again starting in September. There is no advanced purchase required so you can fly as early as tomorrow if you wish. Air Canada has slightly lower prices in the spring/fall since they connect in Canada where there are lower taxes on connecting flights.
Chinese New Year is February 16 so you can use this fare to indulge in the festivities.
Need a room in Shanghai? Here's what's available for the above dates on Hotelwatchdog.