Indira Gandhi International Airport, situated to the south-west of Delhi, is the main gateway for the city's domestic and international civilian air traffic. In 2015–16, the airport handled more than 48 million passengers, making it the busiest airport in India and South Asia. Terminal 3, which cost  to construct between 2007 and 2010, handles an additional 37 million passengers annually. In 2010, IGIA was conferred the 4th best airport award in the world in the 15–25 million category, by Airports Council International. The airport was rated as the ''Best airport in the world'' in the 25–40 million passengers category in 2015, by Airports Council International. Delhi Airport was awarded ''The Best Airport in Central Asia'' and ''Best Airport Staff in Central Asia'' at the Skytrax World Airport Awards 2015. Hindon Domestic Airport in Ghaziabad was inaugurated by Prime Minister Narendra Modi as the second airport for the Delhi-NCR Region on 8 March 2019. A second international airport open for commercial flights has been suggested either by expansion of Meerut Airport or construction of a new airport in Greater Noida.