Cheap flights from Sydney to London from $661

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Sydney, with most prices found around $1,576. If you aren’t able to travel during the month of February, then book flights to London Heathrow Airport from Sydney during May instead. Flights to London Heathrow Airport in May, while not as cheap as those in February, still average around $1,703.

Our data shows that Sunday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $2,195. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Sydney to London Heathrow Airport for around $2,674.

At midday is the cheapest time of day to fly from Sydney to London Heathrow Airport when you can find flight prices for as low as $2,346. Flying to London Heathrow Airport at midday is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to London Heathrow Airport is in the evening when prices are around $3,734.

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

You are more likely to see cheaper flights to London Heathrow Airport from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $1,996 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Sydney for as low as $1,860 on momondo.

There are 4 cabin classes available to choose from on Sydney to London Heathrow Airport 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 16% on your flight if you consider stops on a Sydney to London Heathrow Airport flight.

As of October 2026, prices for Sydney to London Heathrow Airport flights are approximately 8% more expensive when compared to flights at the same time last year.

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

Etihad Airways, Singapore Airlines and Qantas Airways are the top three most popular airlines that fly to London Heathrow Airport from Sydney according to our data. Etihad Airways is the first choice among our users, with 40% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 23 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Singapore (SIN) was the most common stop: 30% of momondo users choosing one-stop flights on this route connected there.

Flights via Taipei City (TPE) offer the lowest average return price of $1,665.

Flights connecting via Dubai (DXB) have the shortest average one-way travel time: 24h 43m.

Singapore (SIN) has the shortest average stopover time for this route: 2h 29m.

As of October 2026, 3 flights take off from Sydney and land in London Heathrow Airport each day. The most common flight departure time for this route is 15:00, with 100% of daily flights taking off in the afternoon.

The number of flights available between Sydney and London Heathrow Airport is 21 per week as of October 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.