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

General Mitchell International Airport. This airport in the United States is also referred to as MKE or sometimes KMKE
Hopkins International Airport. This airport in the United States is also referred to as CLE or sometimes KCLE
Detroit Metro Airport. This airport in the United States is also referred to as DTW or sometimes KDTW
Kansas City International Airport. This airport in the United States is also referred to as MCI or sometimes KMCI
Des Moines International Airport. This airport in the United States is also referred to as DSM or sometimes KDSM
City of Colorado Springs Airport. This airport in the United States is also referred to as COS or sometimes KCOS
Eppley Airfield. This airport in the United States is also referred to as OMA or sometimes KOMA
Austin-Bergstrom International Airport. This airport in the United States is also referred to as AUS or sometimes KAUS
Lambert-St. Louis International Airport. This airport in is also referred to as STL or sometimes KSTL
Portland International Airport. This airport in the United States is also referred to as PDX or sometimes KPDX
San Diego International Airport. This airport in the United States is also referred to as SAN or sometimes KSAN
Salt Lake City International Airport. This airport in the United States is also referred to as SLC or sometimes KSLC

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".