All the airports that Singapore Airlines flights have traveled to See the airports that Singapore Airlines flights have come from / or see all the flights this airline has flown (in and out of SFO)

Kahului Airport. This airport in the United States is also referred to as OGG or sometimes PHOG
Honolulu International Airport. This airport in the United States is also referred to as HNL or sometimes PHNL

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".