The GVK group-run Mumbai airport has become the world's busiest amongst the single-runway facilities by handling 837 flights a day or one in 65 seconds on an average in fiscal 2017, overtaking London's Gatwick airport that had 757 flights a day. In terms of the number of passengers also, the city airport tops with 45.2 million people flying in and out in fiscal 2017 as against 44 million at Gatwick airport.
Notably, no other large city in the world is served by one airport, that too with a single-runway. Besides, illegal squatters occupy nearly one-third of the airport land. The second airport proposed in Navi Mumbai is yet to come up.