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

Los Angeles International Airport. This airport in the United States is also referred to as LAX or sometimes KLAX
Chicago O'Hare International Airport. This airport in the United States is also referred to as ORD or sometimes KORD
Denver International Airport. This airport in the United States is also referred to as DEN or sometimes KDEN
Dulles International Airport. This airport in the United States is also referred to as IAD or sometimes KIAD
Newark International Airport. This airport in the United States is also referred to as EWR or sometimes KEWR
San Diego International Airport. This airport in the United States is also referred to as SAN or sometimes KSAN
McCarran International Airport. This airport in the United States is also referred to as LAS or sometimes KLAS
Tacoma International Airport. This airport in the United States is also referred to as SEA or sometimes KSEA
George Bush Intercontinental Airport. This airport in the United States is also referred to as IAH or sometimes KIAH
Portland International Airport. This airport in the United States is also referred to as PDX or sometimes KPDX
Gen E L Logan International Airport. This airport in the United States is also referred to as BOS or sometimes KBOS
John F Kennedy International Airport. This airport in the United States is also referred to as JFK or sometimes KJFK

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".