Singapore: Singapore's Changi Airport has been voted the World's Best Airport for the fourth year in a row at the 2016 World Airport Awards, said Changi Airport Group. This is the seventh time that Changi Airport has picked up this title at the World Airport Awards, Xinhua news agency reported on Thursday. The airport was also awarded Best Airport for Leisure Amenities, according to the airport. The 2016 World Airport Awards are based on a survey of 13.25 million customer nominations across 106 nationalities of air travelers and covered 550 airports worldwide. The survey, conducted by global aviation research firm Skytrax, evaluates customer satisfaction across 39 key performance indicators for airport service and product. South Korea's Incheon International Airport ranked the second place, followed by Germany's Munich Airport and Japan's Tokyo International Airport, or Haneda Airport.