It is big, big news. Big enough to support 90 million international passengers every year, with the potential for 200 million. Istanbul New Airport, constructed over an area of 76.5 million square metres, which opened on Turkey&rsquos National Day, October 29, is now the largest in the world. Istanbul&rsquos third international airport after Istanbul Atatürk Airport and Sabiha Gökçen International Airport, it is being developed by IGA, a joint venture by five major companies.