Cheap flights from London to Australia from £420

The month of May is, on average, the cheapest month to fly to Australia from London, with most prices found around £921. The month of June is another great option to travel to Australia, with average flight prices from London averaging around £941.

The cheapest day to depart on your flight to Australia is on a Monday when prices can be found for as low as £1,176. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Australia is Wednesday, with ticket prices averaging around £1,292.

Fly from London Heathrow to Perth for the best London - Australia flight prices

You are more likely to see cheaper flights to Australia from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around £1,041 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from London for as low as £979 on momondo.

There are 4 cabin classes available to choose from on London to Australia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 17% on your flight if you consider stops on a London to Australia flight.

China Eastern, SWISS, and Vietnam Airlines are the most popular carriers operating from London to Australia

Singapore Airlines, Cathay Pacific and Qatar Airways are the top three most popular airlines that fly to Australia from London according to our data. Singapore Airlines is the first choice among our users, with 27% of people opting to fly with this airline when travelling to Australia. Keep in mind that there are 33 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 24% of flights between London and Australia have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, Qantas Airways have had the fewest delays on this route over the last 12 months, with about 24% of their flights experiencing any sort of delay.

As of June 2026, there are 4 flights per day flying from London to Australia. The most common time of day flights depart is 22:00, with 75% of flights taking off in the evening.

28 flights are operational weekly from London to Australia as of June 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.