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 April 06, 2007. Passengers were flying aboard a Boeing 737-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on April 25, 2007. 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 April 04, 2007. Passengers were flying aboard a Boeing 737-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on April 28, 2007. Passengers were flying aboard an Airbus A319. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on April 07, 2007. Passengers were flying aboard a Boeing 737-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on May 04, 2007. Passengers were flying aboard a Boeing 737-500. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on May 01, 2007. Passengers were flying aboard a Boeing 737-500. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on May 19, 2007. Passengers were flying aboard an Airbus A319. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on June 26, 2009. Passengers were flying aboard a Boeing 737-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on June 28, 2009. Passengers were flying aboard a Boeing 737-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on June 13, 2009. Passengers were flying aboard a Boeing 737-300. See all the flights for UA423.
UAL423 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on June 14, 2009. Passengers were flying aboard a Boeing 737-300. 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".