Cheap flights from London Heathrow Airport to Sydney from £505

In general, May is the cheapest month to fly from London Heathrow Airport to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £890. If you don’t want to visit Sydney in May, then you should wait until June to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £938.

The cheapest day to depart on your flight to Sydney is on a Monday when prices can be found for as low as £1,182. 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 Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,301.

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

You are more likely to see cheaper flights to Sydney from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around £1,057 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 Heathrow Airport for as low as £986 on momondo.

There are 4 cabin classes available to choose from on London Heathrow Airport 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 2% on your flight if you consider stops on a London Heathrow Airport to Sydney flight.

China Eastern and Vietnam Airlines are the most popular carriers operating from London Heathrow to Sydney Kingsford Smith

Cathay Pacific, Etihad Airways and China Southern are the top three most popular airlines that fly to Sydney from London Heathrow Airport according to our data. Cathay Pacific is the first choice among our users, with 33% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 30 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Hong Kong (HKG) 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 £528.

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

Dallas (DFW) has the shortest average stopover time for this route: 2h 25m.

As of July 2026, 2 flights take off from London Heathrow Airport and land in Sydney each day. The most common flight departure time for this route is 22:00, with 100% of daily flights taking off in the evening.

20 flights are operational weekly from London Heathrow Airport to Sydney as of July 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.