Delhi’s Indira Gandhi International Airport (IGIA) and Mumbai’s Chhatrapati Shivaji Maharaj International Airport have beaten 1,952 other airports from 176 countries to tie at number one for world’s best airports, as per Airports Council International (ACI) ASQ 2017 rankings. The Airport Service Quality Awards 2017 was announced by the Airports Council International (ACI), which conferred the ranking on the basis of a worldwide programme in which passengers were surveyed across airports for their feedback on 34 key performance indicators.