Currently, November is the cheapest month in which you can book a flight to Australia. Flying to Australia in July will prove the most costly. There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

In 2026, the cheapest month to travel to Australia is generally May or November, which represent the "shoulder seasons." During these months, the weather is mild across most of the continent, but demand is lower because it falls outside the major school holiday periods. May is particularly affordable for those visiting the southern cities like Melbourne and Sydney, as it is the transition into late autumn. For those looking for the absolute lowest airfares, late August to early September (late winter) can also yield great deals, though the weather in the south can be chilly and wet. Conversely, the peak summer months of December and January—especially around Christmas and New Year—are the most expensive due to high domestic and international demand. Travelers from regions like India or Europe often find that November offers the best balance of low flight prices and warm "pre-summer" weather that is perfect for exploring the Great Barrier Reef or the Outback before the extreme heat and humidity of the tropical wet season fully set in.