British South American Airways (BSAA) was a state-run airline of the United Kingdom in the mid-to-late 1940s responsible for services to the Caribbean and South America. Originally named British Latin American Air Lines, it was renamed before services started in 1946. BSAA operated mostly Avro aircraft: Yorks, Lancastrians and Tudors and flew to Bermuda, the West Indies, Mexico and the western coast of South America. After two high-profile aircraft disappearances it was merged into the British Overseas Airways Corporation at the end of 1949.

The Avro York was a British transport aircraft developed by Avro during the Second World War. The design was derived from the Avro Lancaster heavy bomber, several sections of the York and Lancaster being identical. Due to the importance of Lancaster production, York output proceeded slowly until 1944, after which a higher priority was placed upon transport aircraft.