Approximately half of all international travellers to Australia fly in through the Kingsford-Smith International Airport in Sydney, even though flights can be booked to a number of international airports throughout Australia. These include Melbourne (Tullamarine Airport), Brisbane, Perth, Cairns, Adelaide, Darwin, the Gold Coast (Coolangatta), Norfolk Island, Newcastle and Broome.

You can expect flight times of 3 hours from New Zealand, a 7-11 hour flight from countries in Asia, a 15 hour flight from the west of the United States of America, an 18 hour flight from Johannesburg, South Africa, a 13-16 hours flight from South America, and up to a 24 hour flight from western Europe.

Customs
Australia has a very strict customs requirement when it comes to animal and vegetable imports including wood, and other prohibited goods. This is because Australia is a large and isolated island, and thus far free of many diseases and insect pests found in other countries. All incoming visitors must pass a customs check for these items. No fruits, vegetables, meat or other food products are allowed in unless they are factory-made and on the approved list of imports (for example, chocolate is acceptable).

There is no penalty for declaring most goods that are prohibited from import - they'll just be confiscated and destroyed or held in quarantine - but if you attempt to bring them in without declaring them, there are extremely heavy penalties including fines (in the order of thousands of dollars) and a possible jail term. It is far safer to declare any items that only might be prohibited, if they are not then you will suffer no consequence.