All the airports that flights arriving at Gate D9 ( between 2019-10-16 and 2020-~05 ) have come from See the airports that flights leaving from Gate D9 are going to / or see all the flights in and out of this gate

Roberts Field Airport. This airport in the United States is also referred to as RDM or sometimes KRDM
Tampa International Airport. This airport in the United States is also referred to as TPA or sometimes KTPA

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".