Flights for G45121 These are not all the flights that G45121 has taken, just some of them that have flown in or out of SFO

AAY5121 (IFP-SFO)
This Allegiant Air flight traveled from Laughlin/bullhead Int'l Airport to San Francisco International Airport, on January 12, 2012. Passengers were flying aboard a McDonnell Douglas MD-87. See all the flights for G45121.
AAY5121 (SFO-EUG)
This Allegiant Air flight traveled from San Francisco International Airport to Eugene Airport-Mahlon Sweet Field, on January 12, 2012. Passengers were flying aboard a McDonnell Douglas MD-87. See all the flights for G45121.

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".