Cairns Airport (IATA: CNS,ICAO YBCS) is an international airport Cairns, Queensland Australia Formerly operated by the Cairns Port Authority, the airport was sold by the Queensland Government in December 2008 to a private consortium. It is the seventh busiest airport in Australia. The airport is located 7 kilometres (4 miles) north of the Cairns central business district in the suburb of Aeroglen. The airport lies between Mount Whitfield to the west and Trinity Bay to the east.

The airport serves international, domestic and general aviation flights including a number of helicopter operators. Flights are operated to major Australian cities and tourist destinations, regional communities in Far North Queensland, and a number of international destinations in the Asia- Pacific connections to the rest of the world.

The airport formed the main base for Australian Airlines of operations in June 2006 (the airport remains a major port for parent company Qantas). It is also a base for the Royal Flying Doctor Service in Australia and the research and rescue helicopters of the State Emergency Services. The airport has completed its 2 year renovation and is now fully operational.

The Cairns Seaport, located on Trinity Inlet, is operated by the Cairns Port Authority.[ It serves as an important port for tourist operators providing daily reef trips. These consist of large catamarans capable of carrying over 300 passengers, as well as smaller operators that may take as few as 12 tourists. Cairns Port is also a port of call for cruise ships cruising the South Pacific Ocean. It also provides freight services to coastal townships on Cape York Peninsula, the Torres Straight and the Gulf of Carpentaria.

Yearly cargo through the port totals 1.13 million tonnes. Almost 90% of the trade is bulk cargoes- including petroleum, sugar, molasses, fertiliser and LP gas. A large number of fishing trawlers are also located at the port. There is also a marina that houses private yachts and boats used for tourist operations.

The Royal Australian Navy has a base in Cairns (HMAS Cairns.[] The base has a complement of 900 personnel, and supports fourteen warships, including the four Armidale class patrol boats of Ardent Division, four of the six Balikpapan class landing craft, and all six ships of the Royal Australian Navy Hydrographic service.

The Trinity Wharf has recently been the subject of a major redevelopment to improve the area for tourist and cruise ship operations. The freight wharves are located to the south of Trinity Wharf further up Trinity Inlet.