Cheap flights from Sydney to London from £412

The cheapest month to fly to London from Sydney is in May. Flight prices, which tend to average around £798, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Sydney averaging around £817.

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £1,015. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Sydney to London for around £1,466.

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £1,110. Flights in the afternoon are often more expensive, with an average ticket price of £1,416.

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

You are more likely to see cheaper flights to London from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £974 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Sydney for as low as £899 on momondo.

There are 3 cabin classes available to choose from on Sydney to London 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 45% on your flight if you consider stops on a Sydney to London flight.

As of April 2026, prices for Sydney to London flights are approximately 32% more expensive when compared to flights at the same time last year.

AirAsia X, Virgin Australia, and Qatar Airways are the most popular carriers operating from Sydney Kingsford Smith to London

British Airways, Etihad Airways and Emirates are the top three most popular airlines that fly to London from Sydney according to our data. British Airways is the first choice among our users, with 31% of people opting to fly with this airline when travelling to London. Keep in mind that there are 15 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Flights via Haikou (HAK) offer the lowest average return price of £572.

Flights connecting via Dubai (DXB) have the shortest average one-way travel time: 23h 44m.

Dubai (DXB) has the shortest average stopover time for this route: 1h 40m.

As of April 2026, there are 3 flights per day flying from Sydney to London. The most common time of day flights depart is 14:00, with 100% of flights taking off in the afternoon.

As of April 2026, there are 21 flights per week flying from Sydney to London. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.