Flights for UA231 These are not all the flights that UA231 has taken, just some of them that have flown in or out of SFO

UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 03, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on July 19, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 20, 2011. Passengers were flying aboard an Airbus A320-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 25, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on January 09, 2013. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 01, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 09, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 19, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 24, 2011. Passengers were flying aboard an Airbus A319. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 16, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 10, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.
UAL231 (ORD-SFO)
This United Airlines flight traveled from Chicago O'Hare International Airport to San Francisco International Airport, on August 26, 2011. Passengers were flying aboard a Boeing 757-200. See all the flights for UA231.

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".