Fazenda Santa Rita de Cássia Airstrip is a private general aviation facility located in the municipality of Mineiros, in the state of Goiás, Brazil. Registered under the ICAO designator SI9A, it serves the agricultural estate (fazenda) of the same name and is not open to scheduled commercial air traffic. The airstrip is typical of the many private farm strips found across Brazil's central-western agricultural heartland, primarily supporting light aircraft operations for estate management, cargo, and personnel transport. Detailed operational data for this facility is not publicly documented.