Most visitors from abroad fly into Brisbane, although Gold Coast Airport and Cairns both receive scheduled international flights with major airlines such as British Airways and Qantas. It takes about 24hrs to fly to Brisbane from the UK, usually with a stop-over in Singapore or elsewhere. See our advice on coping with long flights and jet-lag with kids.
Once you’re there, there are scheduled regional airports served by domestic flights, including the Great Barrier Reef Airport. Even if you have a hire-car or motorhome, never underestimate the distances involved here: it’s 1715km from Brisbane to Cairns.