Cheap flights from Sydney to London from £423

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 £803. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Sydney averaging around £847.

On average, the least expensive day to fly to London Heathrow Airport from Sydney is on a Thursday. momondo users have found tickets for Thursday departures for as low as £1,158. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £1,974.

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Sydney to London Heathrow Airport at midday for as low as £1,250. 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 in the afternoon when prices are £1,424 on average. Flights to London Heathrow Airport from Sydney in the afternoon 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 £991 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 £951 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 11% on your flight if you consider stops on a Sydney to London Heathrow Airport flight.

As of May 2026, prices for Sydney to London Heathrow Airport flights are approximately 36% more expensive when compared to flights at the same time last year.

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

Etihad Airways, British Airways and Emirates 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 37% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 13 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: 24% of momondo users choosing one-stop flights on this route connected there.

Flights via New Delhi (DEL) offer the lowest average return price of £816.

Flights connecting via Dubai (DXB) have the shortest average one-way travel time: 23h 56m.

Dubai (DXB) has the shortest average stopover time for this route: 1h 50m.

As of May 2026, there are 2 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 May 2026, there are 20 flights per week flying from Sydney to London Heathrow Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.