Home Postcode finder NSWDL Sydney International Airport Sydney International Airport postcode NSWDL Sydney International Airport is a locality in New South Wales covered by postcode 2020. Postcode 2020 State or territory New South Wales (NSWDL) Region Alexandria Add a free Sydney International Airport business listing Be the first listing in Sydney International Airport Common questionsWhat is the postcode for Sydney International Airport?Sydney International Airport, NSWDL has the postcode 2020.What state is Sydney International Airport in?Sydney International Airport is in New South Wales (NSWDL).Does postcode 2020 cover more than one suburb?Yes. Postcode 2020 covers 3 localities, so the postcode alone does not identify Sydney International Airport. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.