Cheap flights from Sydney to London from £339

In general, February is the cheapest month to fly from Sydney to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £808. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from Sydney averaging around £840.

On average, the least expensive day to fly to London Heathrow Airport from Sydney is on a Monday. momondo users have found tickets for Monday departures for as low as £1,101. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £1,533.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Sydney to London Heathrow Airport in the afternoon for as low as £1,387. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £1,463 on average. Flights to London Heathrow Airport from Sydney at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 £1,012 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 £912 on momondo.

There are 3 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 4% on your flight if you consider stops on a Sydney to London Heathrow Airport flight.

As of August 2026, prices for Sydney to London Heathrow Airport flights are approximately 37% cheaper when compared to flights at the same time last year.

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

Etihad Airways, Emirates and British 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 41% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 10 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Abu Dhabi (AUH) was the most common stop: 28% of momondo users choosing one-stop flights on this route connected there.

Flights via New Delhi (DEL) offer the lowest average return price of £805.

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

As of August 2026, there are 23 flights per week flying from Sydney to London Heathrow Airport. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.