Operating since 1919, Sydney (Kingsford Smith) Airport is one of the world's oldest airports. Located only 8 km from the city centre, the airport site is now hemmed in on three sides by urban growth and on the fourth side by Botany Bay. The aforementioned reasons mean that expansion of Kingsford Smith Airport is highly difficult, as to expand the field, large areas of land need to be reclaimed from the sea or gathered through resumptions and suburb demolitions, both of which are extremely costly solutions. There have thus been various proposals to build a second airport for Sydney since the 1960s.
