Finding cheap flights to Australia usually starts with keeping both your dates and arrival point flexible. Australia’s size means fares can vary considerably between Perth, Sydney, Melbourne, Brisbane and other gateways, even when the final trip plans are similar. It is worth comparing the full cost of each option, including any domestic connection, baggage charges and transport from the arrival airport. A lower fare to one city may not represent good value if reaching your intended destination requires an expensive onward journey.

Demand changes through the year, particularly around Australian summer, Christmas and New Year, as well as UK and Australian school-holiday periods. Travelling outside these busy windows can provide more choice, while checking several nearby departure and return dates helps reveal how much flexibility could save. The best balance also depends on the type of trip: Perth may suit a western itinerary, while Cairns or the Gold Coast could be more convenient for a warmer coastal holiday. Comparing Adelaide, Canberra, Newcastle and Melbourne can also make sense when plans are centred on those regions.

Departure airport choice matters from the UK, too. Fares from London airports may look attractive, but a flight from Manchester, Edinburgh or another reachable airport could reduce rail, hotel and parking costs. Conversely, positioning separately for a cheaper long-haul fare only works when there is enough time to protect against delays and the added tickets remain worthwhile.

When comparing flights to Australia from the UK, start with the part of the country you plan to reach rather than focusing only on the first available fare. Australia is vast, so landing in Perth may be sensible for a stay in Western Australia, while Sydney, Melbourne, Brisbane or Adelaide may provide a more practical starting point for trips in the east and south. Cairns, Gold Coast, Canberra and Newcastle can also suit particular itineraries, but may require a domestic connection depending on your chosen departure and booking.

London offers the widest range of international departure options, while travellers elsewhere in the UK may find it more convenient to compare a regional airport with a separate journey to London. Check the complete itinerary, including the number of connections, airport changes and whether baggage is checked through to Australia. A self-transfer can require collecting and rechecking bags, so allow substantial time or consider booking the onward flight separately only when the saving justifies the added risk.

For a connecting journey within Australia, compare the total travel time and the arrival airport as carefully as the international flight. An airport closer to your first accommodation can avoid a lengthy ground transfer, while arriving in Sydney, Melbourne or Brisbane may offer more onward transport choices. Also check terminal arrangements, connection times and the cost of getting from the airport to your final destination before choosing between otherwise similar options.