Cheap flights from London to Australia from $725

In general, May is the cheapest month to fly from London to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,458. If you don’t want to visit Australia in May, then you should wait until June to fly from London, when ticket prices are also cheap, with an average price of $1,560.

On average, the least expensive day to fly to Australia from London is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $2,104. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from London to Australia on a Thursday will generally be more expensive and average around $3,139. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Fly from London Heathrow to Sydney Kingsford Smith 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 $1,879 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 $1,662 on momondo.

China Eastern, Tianjin Airlines, and AirAsia X are the most popular carriers operating from London to Australia

China Southern, Singapore Airlines and Qatar Airways are the top three most popular airlines that fly to Australia from London according to our data. China Southern 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 18 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 125 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.

Thursday 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.

The number of flights available between London and Australia is 4 per day as of February 2026. The most frequent departure time is 21:00, with 75% of daily flights leaving in the evening.

The number of flights available between London and Australia is 28 per week as of February 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.