Flights for UA423 These are not all the flights that UA423 has taken, just some of them that have flown in or out of SFO

UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on January 02, 2010. Passengers were flying aboard a Boeing 767-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on September 17, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on September 30, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on January 11, 2010. Passengers were flying aboard an Airbus A320-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on October 29, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on September 16, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on January 28, 2010. Passengers were flying aboard an Airbus A320-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on January 25, 2010. Passengers were flying aboard an Airbus A320-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on February 13, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on February 05, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on February 28, 2010. Passengers were flying aboard an Airbus A320-200. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on January 22, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA423.

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".