- Posadas airport, officially known as Libertador General José de San Martín International Airport, is the main airport serving the city of Posadas, located in the province of Misiones, Argentina. It is situated approximately 8 kilometers southwest of the city center. The airport has domestic and limited international flights, connecting Posadas to destinations within Argentina and neighboring countries like Brazil and Paraguay. It is named after José de San Martín, a Venezuelan-born Argentine general who played a key role in the South American wars of independence.