Cheap flights from London to Sydney from £430

In general, May is the cheapest month to fly from London to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £869. If you don’t want to visit Sydney in May, then you should wait until June to fly from London, when ticket prices are also cheap, with an average price of £915.

The cheapest day to depart on your flight to Sydney is on a Monday when prices can be found for as low as £1,157. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,265.

Fly from London Heathrow to Sydney Kingsford Smith for the best London - Sydney Kingsford Smith flight prices

You are more likely to see cheaper flights to Sydney from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around £1,066 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from London for as low as £931 on momondo.

There are 4 cabin classes available to choose from on London to Sydney 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 4% on your flight if you consider stops on a London to Sydney flight.

SWISS, British Airways, and Turkish Airlines are the most popular carriers operating from London to Sydney Kingsford Smith

Cathay Pacific, Etihad Airways and Emirates are the top three most popular airlines that fly to Sydney from London according to our data. Cathay Pacific is the first choice among our users, with 34% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 29 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Abu Dhabi (AUH) was the most common stop: 21% of momondo users choosing one-stop flights on this route connected there.

Flights via Manama (BAH) offer the lowest average return price of £523.

Flights connecting via Manama (BAH) have the shortest average one-way travel time: 19h 45m.

Singapore (SIN) has the shortest average stopover time for this route: 2h 00m.

3 flights are operational daily from London to Sydney as of September 2026. The most popular departure time for this route is 22:00, with 100% of flights per day taking off in the evening.

As of September 2026, 22 flights take off from London and land in Sydney each week. The most common flight departure day for this route is Wed, with 18% of weekly flights taking off on this day.