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Cheap flights from London to Sydney from $685

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Sydney departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from London to Sydney (LON-SYD)

Cheap return flights

China Southern Logo
17:15 - 07:30LHR-SYD
51h 15m2 stops
China Southern Logo
22:00 - 17:55SYD-LHR
54h 55m2 stops
$1,000China Southern
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Wed, 29 Oct - Wed, 5 Nov
China Southern Logo
17:15 - 20:20LHR-SYD
40h 05m2 stops
China Southern Logo
11:25 - 18:15SYD-LHR
41h 50m1 stop
$1,017China Southern
Find Deal
Sun, 2 Nov - Mon, 10 Nov
China Eastern Logo
10:30 - 11:00LGW-SYD
61h 30m2 stops
China Eastern Logo
21:30 - 06:30SYD-LGW
44h 00m1 stop
$1,086China Eastern
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Mon, 3 Nov - Wed, 12 Nov
China Eastern Logo
21:20 - 09:00LHR-SYD
26h 40m1 stop
China Eastern Logo
11:00 - 18:40SYD-LHR
40h 40m1 stop
$1,123China Eastern
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Thu, 28 Aug - Wed, 10 Sep
Air China Logo
22:40 - 14:50LHR-SYD
31h 10m1 stop
Air China Logo
19:40 - 20:30SYD-LHR
33h 50m1 stop
$1,159Air China
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Sun, 7 Sep - Tue, 16 Sep
Air China Logo
20:25 - 14:50LHR-SYD
33h 25m1 stop
Air China Logo
19:40 - 20:30SYD-LHR
33h 50m1 stop
$1,187Air China
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Tue, 9 Sep - Tue, 16 Sep
SWISS Logo
19:10 - 07:15LCY-SYD
25h 05m2 stops
SWISS Logo
15:15 - 08:35SYD-LCY
28h 20m2 stops
$1,741SWISS
Find Deal
Mon, 10 Nov - Wed, 19 Nov
SWISS Logo
19:10 - 07:15LCY-SYD
25h 05m2 stops
SWISS Logo
15:15 - 08:45SYD-LCY
28h 30m2 stops
$1,794SWISS
Find Deal
Mon, 10 Nov - Thu, 20 Nov
Emirates Logo
20:15 - 18:35STN-SYD
35h 20m1 stop
Emirates Logo
06:00 - 18:00SYD-STN
23h 00m1 stop
$1,851Emirates
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Mon, 3 Nov - Wed, 12 Nov
Emirates Logo
20:15 - 18:35STN-SYD
35h 20m1 stop
Emirates Logo
21:10 - 12:05SYD-STN
25h 55m1 stop
$1,852Emirates
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Mon, 3 Nov - Wed, 12 Nov

Air China flights from London to Sydney

Our best Air China deals on London to Sydney flight tickets
Air China
7 Sept
LHR22:40London Heathrow
31h 10m
1 stop
SYD14:50Sydney Kingsford Smith
16 Sept
SYD19:40Sydney Kingsford Smith
33h 50m
1 stop
LHR20:30London Heathrow
$1,159
Find similar
Air China
9 Sept
LHR20:25London Heathrow
33h 25m
1 stop
SYD14:50Sydney Kingsford Smith
16 Sept
SYD19:40Sydney Kingsford Smith
33h 50m
1 stop
LHR20:30London Heathrow
$1,187
Find similar
Air China
24 Aug
LGW21:10London Gatwick
32h 40m
1 stop
SYD14:50Sydney Kingsford Smith
7 Sept
SYD19:40Sydney Kingsford Smith
43h 55m
1 stop
LGW06:35London Gatwick
$1,437
Find similar

China Southern flights from London to Sydney

Our best China Southern deals on London to Sydney flight tickets
China Southern
29 Oct
LHR17:15London Heathrow
51h 15m
2 stops
SYD07:30Sydney Kingsford Smith
5 Nov
SYD22:00Sydney Kingsford Smith
54h 55m
2 stops
LHR17:55London Heathrow
$1,000
Find similar
China Southern
2 Nov
LHR17:15London Heathrow
40h 05m
2 stops
SYD20:20Sydney Kingsford Smith
10 Nov
SYD11:25Sydney Kingsford Smith
41h 50m
1 stop
LHR18:15London Heathrow
$1,017
Find similar
China Southern
2 Nov
LHR17:15London Heathrow
29h 10m
2 stops
SYD09:25Sydney Kingsford Smith
11 Nov
SYD11:25Sydney Kingsford Smith
41h 50m
1 stop
LHR18:15London Heathrow
$1,020
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 17 August 2025.
Use the filters below to find and compare flights from London to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSydney

LHR - SYD

LHRSYD

London Heathrow

Wed 29/10

17:15-07:30

2 stops51h 15m

Sydney Kingsford Smith

Wed 5/11

22:00-17:55

2 stops54h 55m

$1,000

LondonSydney

LHR - SYD

LHRSYD

London Heathrow

Sun 2/11

17:15-20:20

2 stops40h 05m

Sydney Kingsford Smith

Mon 10/11

11:25-18:15

1 stop41h 50m

$1,017

LondonSydney

LGW - SYD

LGWSYD

London Gatwick

Mon 3/11

10:30-11:00

2 stops61h 30m

Sydney Kingsford Smith

Wed 12/11

21:30-06:30

1 stop44h 00m

$1,086

LondonSydney

LHR - SYD

LHRSYD

London Heathrow

Thu 28/8

21:20-09:00

1 stop26h 40m

Sydney Kingsford Smith

Wed 10/9

11:00-18:40

1 stop40h 40m

$1,123

LondonSydney

LHR - SYD

LHRSYD

London Heathrow

Sun 7/9

22:40-14:50

1 stop31h 10m

Sydney Kingsford Smith

Tue 16/9

19:40-20:30

1 stop33h 50m

$1,159

LondonSydney

LHR - SYD

LHRSYD

London Heathrow

Tue 9/9

20:25-14:50

1 stop33h 25m

Sydney Kingsford Smith

Tue 16/9

19:40-20:30

1 stop33h 50m

$1,187

LondonSydney

LCY - SYD

LCYSYD

London City

Mon 10/11

19:10-07:15

2 stops25h 05m

Sydney Kingsford Smith

Wed 19/11

15:15-08:35

2 stops28h 20m

$1,741

LondonSydney

LCY - SYD

LCYSYD

London City

Mon 10/11

19:10-07:15

2 stops25h 05m

Sydney Kingsford Smith

Thu 20/11

15:15-08:45

2 stops28h 30m

$1,794

LondonSydney

STN - SYD

STNSYD

London Stansted

Mon 3/11

20:15-18:35

1 stop35h 20m

Sydney Kingsford Smith

Wed 12/11

06:00-18:00

1 stop23h 00m

$1,851

LondonSydney

STN - SYD

STNSYD

London Stansted

Mon 3/11

20:15-18:35

1 stop35h 20m

Sydney Kingsford Smith

Wed 12/11

21:10-12:05

1 stop25h 55m

$1,852

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

How to get the cheapest flight ticket from London to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London and Sydney?

What is the cheapest month to fly to Sydney?

The month of May is, on average, the cheapest month to fly to Sydney from London, with most prices found around $1,632. If you aren’t able to travel to Sydney during the month of May, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,706.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Tuesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $2,162. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $3,096.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the afternoon. momondo users have found flights departing from London to Sydney in the afternoon for as low as $1,937. 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 evening when prices are $2,559 on average. Flights to Sydney from London in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest London to Sydney Kingsford Smith flight route?

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

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,035 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from London for as low as $1,660 on momondo.

What cabin class options are available on London to Sydney Kingsford Smith flights?

There are 3 cabin classes available to choose from on London to Sydney Kingsford Smith flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to Sydney flights?

You could potentially save up to 40% on your flight if you consider stops on a London to Sydney flight.

How have London to Sydney flight prices changed over time?

As of August 2025, prices for London to Sydney flights are approximately 4% more expensive when compared to flights at the same time last year.

When to book flights from London to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from London to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Sydney (LON to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Sydney

Best price found

$685

Fastest flight time

22h 25m

Direct flights

Every day

Airports in Sydney

1 airport
The best one-way flight to Sydney from London in the past 72 hours is $685. The best return flight deal from London to Sydney found on momondo in the last 72 hours is $1,000.
The fastest flight from London to Sydney takes 22h 25m
Direct flights go from London to Sydney every day.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)
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  • How far is London to Sydney Kingsford Smith by plane?

    A flight from London to Sydney Kingsford Smith will travel around 16983.0 km. A reasonable flight in good conditions will take 22h 25m.

  • When did momondo last update prices for flights from London to Sydney Kingsford Smith Airport?

    Prices for flights from London to Sydney Kingsford Smith Airport refresh daily.

  • How many operators does momondo search for flights from London to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from London to Sydney Kingsford Smith Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London to Sydney?

  • What is the most popular airline from London to Sydney?

Best airlines flying from London to Sydney

Compare and see reviews for airlines that fly from London to Sydney with momondo
Airline
Rating
Free cancellation
Price
Air ChinaPriceFrom $624Free cancellationRating
7.3
95 reviews
Search Air China flights
China EasternPriceFrom $1,097Free cancellationRating
7.2
160 reviews
Search China Eastern flights
China SouthernPriceFrom $1,111Free cancellationRating
7.6
106 reviews
Search China Southern flights
Air IndiaPriceFrom $1,510Free cancellationRating
5.5
2,930 reviews
Search Air India flights
Malaysia AirlinesPriceFrom $1,545Free cancellationRating
7.4
273 reviews
Search Malaysia Airlines flights
China AirlinesPriceFrom $1,574Free cancellationRating
8.3
764 reviews
Search China Airlines flights
Etihad AirwaysPriceFrom $1,579Free cancellationRating
7.4
1,233 reviews
Search Etihad Airways flights
Cathay PacificPriceFrom $1,673Free cancellationRating
7.6
969 reviews
Search Cathay Pacific flights
British AirwaysPriceFrom $1,687Free cancellationRating
6.6
7,271 reviews
Search British Airways flights
EmiratesPriceFrom $1,741Free cancellationRating
8.1
3,315 reviews
Search Emirates flights

  • Qantas Airways Flights From London to Sydney

    The lowest priced Qantas Airways flight from London to Sydney from the last 72 hours was $1,336. Generally, Qantas Airways has 7 flights on this route every week with an average price of $1,822. Qantas Airways is rated 7.5/10 by our users.

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Wollongong
Parramatta
Terrigal
Katoomba
Penrith
Lithgow
Leura
Manly
Bondi Beach
Coogee
Randwick
Cronulla
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from London to Sydney?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Sydney . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Sydney with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Sydney flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Sydney?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Sydney.

I’m not ready to book a flight from London to Sydney right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Sydney flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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