Cheap flights from Sydney to London from £392

The cheapest month to fly to London from Sydney is in October. Flight prices, which tend to average around £820, 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 £864.

Our data shows that Monday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £1,167. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Sydney to London for around £1,559.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £1,236. Flights at midday are often more expensive, with an average ticket price of £1,266.

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 £1,007 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 £921 on momondo.

There are 2 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 40% on your flight if you consider stops on a Sydney to London flight.

As of July 2026, prices for Sydney to London flights are approximately 31% cheaper when compared to flights at the same time last year.

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

Etihad Airways, Emirates and British Airways are the top three most popular airlines that fly to London from Sydney according to our data. Etihad Airways is the first choice among our users, with 36% of people opting to fly with this airline when travelling to London. Keep in mind that there are 11 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Dubai (DXB) 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 £577.

Flights connecting via Dubai (DXB) have the shortest average one-way travel time: 24h 02m.

Hong Kong (HKG) has the shortest average stopover time for this route: 1h 48m.

As of July 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 July 2026, there are 21 flights per week flying from Sydney to London. The most common day of the week flights depart is Wed, with 19% of flights taking off on this day.