Flights for UA851 These are not all the flights that UA851 has taken, just some of them that have flown in or out of SFO

UAL851 (ANC-SFO)
This United Airlines flight traveled from Ted Stevens Anchorage International Airport to San Francisco International Airport, on June 01, 2006. Passengers were flying aboard a Boeing 747-400. See all the flights for UA851.
UAL851 (KORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on June 20, 2017. Passengers were flying aboard a Boeing 777-200. See all the flights for UA851.
UAL851 (SFO-ZBAA)
This United Airlines flight traveled from San Francisco International Airport to Beijing Capital Airport, on June 01, 2006. Passengers were flying aboard a Boeing 747-400. See all the flights for UA851.
UAL851 (SFO-ZBAA)
This United Airlines flight traveled from San Francisco International Airport to Beijing Capital Airport, on July 29, 2006. Passengers were flying aboard a Boeing 747-400. See all the flights for UA851.
UAL851 (SFO-ZBAA)
This United Airlines flight traveled from San Francisco International Airport to Beijing Capital Airport, on June 20, 2017. Passengers were flying aboard a Boeing 777-200. See all the flights for UA851.

All these flight data are available as openly licensed data on the sfomuseum-data GitHub account. If you'd like to read more about our efforts to archive flight data at SFO Museum have a look a the Mills Field weblog posts tagged "flightdata".