Flights for UA420 These are not all the flights that UA420 has taken, just some of them that have flown in or out of SFO

UAL420 (SNA-SFO)
This United Airlines flight traveled from John Wayne Airport to San Francisco International Airport, on June 04, 2013. Passengers were flying aboard an Airbus A319. See all the flights for UA420.
UAL420 (SNA-SFO)
This United Airlines flight traveled from John Wayne Airport to San Francisco International Airport, on November 20, 2011. Passengers were flying aboard an Airbus A320-200. See all the flights for UA420.

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".