Flights for UA1621 These are not all the flights that UA1621 has taken, just some of them that have flown in or out of SFO

UAL1621 (SFO-SEA)
This United Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on July 25, 2013. Passengers were flying aboard a Boeing 737-900. See all the flights for UA1621.
UAL1621 (SFO-SEA)
This United Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on July 11, 2013. Passengers were flying aboard a Boeing 737-900. See all the flights for UA1621.
UAL1621 (SFO-SNA)
This United Airlines flight traveled from San Francisco International Airport to John Wayne Airport, on November 16, 2013. Passengers were flying aboard a Boeing 737-700. See all the flights for UA1621.
UAL1621 (SFO-SNA)
This United Airlines flight traveled from San Francisco International Airport to John Wayne Airport, on November 23, 2013. Passengers were flying aboard a Boeing 737-700. See all the flights for UA1621.
UAL1621 (STL-SFO)
This United Airlines flight traveled from Lambert-St. Louis International Airport to San Francisco International Airport, on December 21, 2013. Passengers were flying aboard a Boeing 737-700. See all the flights for UA1621.

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".