Cheap flights from Sydney to London from £281

The cheapest month to fly to London from Sydney is in February. Flight prices, which tend to average around £790, are often lower during this time because this is during the off-season. The month of May is another great option to travel to London, with average flight prices from Sydney averaging around £795.

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 £1,042. 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 £1,479.

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £1,089. Flights in the afternoon are often more expensive, with an average ticket price of £1,377.

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 £973 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 £886 on momondo.

There are 3 cabin classes available to choose from on Sydney Kingsford Smith 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 42% on your flight if you consider stops on a Sydney to London flight.

As of March 2026, prices for Sydney to London flights are approximately 22% cheaper when compared to flights at the same time last year.

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

British Airways, Cathay Pacific 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 35% of people opting to fly with this airline when travelling to London. Keep in mind that there are 14 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: 23% of momondo users choosing one-stop flights on this route connected there.

Flights via Haikou (HAK) offer the lowest average return price of £577.

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 March 2026, there are 3 flights per day flying from Sydney to London. The most common time of day flights depart is 16:00, with 95% of flights taking off in the afternoon.

As of March 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.