Wellington Airport WLG officially known as Wellington International Airport New Zealand is the third busiest airport in New Zealand and is located in the suburb of Rongotai in Wellington, New Zealand. The old name of the airport was Rongotai Airport. The is located in the suburb of Rongotai in Wellington, New Zealand. Till 1998, two-thirds of Wellington Airport was owned by a private company named Infratil, and the remaining third was owned by the Wellington City Council.