British Airways Ltd. ended in 1939.
British Airways (BA) is still extant, it was called BOAC (British Overseas Airways Corporation and before that, Imperial Airways. BOAC absorbed BEA (British European Airways)
British Airways Ltd. was created in 1935.
Indian National Airways Ltd ended in 1953.
British Airways Helicopters ended in 1986.
British Mediterranean Airways ended in 2007.
The British Overseas Airways Corporation (BOAC) was the British state airline from 1939 until 1946 and the long-haul British state airline from 1946. The company started life with a merger between Imperial Airways Ltd. and British Airways Ltd. BOAC was merged in 1974 with British European Airways Corporation (BEA) to form British Airways. On 1 September 1972, the British Airways Board was formed, a holding board that controlled BOAC and BEA. On 31 March 1974, both the BOAC and BEA were dissolved and their operations merged to form British Airways.
British United Island Airways ended in 1991.
Indian National Airways Ltd was created in 1933.
Union Airways of N.Z. Ltd was created in 1936.
British Airways was created in 1974 after the merger of two previous companies - The British Overseas Airways Corporation (BOAC - founded 1939) and British European Airways (BEA - founded 1946).However, BOAC was in turn created when a number of airline companies (including a privately owned British Airways Ltd, founded in 1935) were nationalised following a governmental review.
TUR European Airways ended in 1994.
Damania Airways Ltd. was purchased by NEPC Airlines Ltd., a Chennai based aviation Company.
British Airways owns 55% of the International Airlines Group after merging with Iberia. The remaining 45% belongs to Iberai's shareholders. You can get more information about this at the Wikipedia. Once on the website, type "British Airways" into the search field at the top of the page and press enter to bring up the information.