Complex sentence: On 2 May 1952, BOAC became the world's first airline to operate jet airliners; the inaugural flight with the de Havilland Comet 1 was from London to Johannesburg.
Split into simpler sentences: On 2 May 1952, BOAC became the world's first airline to operate jet airliners. The inaugural flight with the de Havilland Comet 1 was from London to Johannesburg.