Star Dust (registration G-AGWH) was a British South American Airways (BSAA) Avro Lancastrian airliner which crashed into Mount Tupungato in the Argentine Andes on 2 August 1947, during a flight from Buenos Aires to Santiago, Chile. A comprehensive search of a wide area (including what is now known to have been the crash site) was fruitless, and the fate of the aircraft and occupants remained unknown for over 50 years.