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Flights · LON → SYD

London to Sydney

Best fare, round trip

$731

−32%

below its usual $1,080
you keep $349

GreatFound
Depart
Tue 10 Nov
Return
Tue 17 Nov
Stay
7 nights
Flight
1 stop · 21.5h
Airline
Air China

Most of this route’s monthly lows fall between $1,002 and $1,143. The drop beats 81% of measured fares on the board, over 7 observed months.

Check this fare Compare sellers

Cached fare — the booking search re-prices live before you pay.

AustraliaSydneyHarbour sails, cliff walks and flat whites that ruin you for coffee anywhere else.Best windowOct–Nov · Mar–AprAirportsKingsford Smith (SYD)Every route into Sydney

Your own dates

Search London to Sydney for the days you want.

Trip options: Round-trip · Economy · 1 adult
Travellers: 1 adult

Fare seasonality

When this route gets cheap.

Fares bottom out in November around $731 and peak in March near $1,205, 65% dearer, across the 7 months we track. The cheapest itinerary we are tracking makes one stop and takes about 21.5 hours outbound, on a 7-night trip — ticketed under Air China, which on a connecting fare need not operate every leg. At $731 for 16,994 km each way, that works out to about $22 per 1,000 km flown. That is well under the $42 per 1,000 km that ultra-long-haul fares on this board typically run. Of the 30 departure cities we track at a similar distance from Sydney, this is the cheapest right now — 16% under the next one, Milan. The best time to be in Sydney: Oct–Nov · Mar–Apr.

Cheapest day in the next 4 months: 10 Nov, $731

Press a day to compare its fares

The median cached fare across this calendar is 2% lower than when tracking began on 8 Aug — $1,172 then versus $1,143 now, across 19 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $703, on 26 Oct.

December 2026

CheapestBelow usualUsualAbove usualCached fares · checked 15 Oct 2026 · bands from 110 tracked fares

Cheapest in Nov, around $731

32% below the $1,080 typical fare

CheapestBelow usualUsualAbove usualPress a month to compare its fares

Cheapest round-trip fare found each month, London to Sydney, from cached prices.

Route facts

Airports
Heathrow (LHR) · Gatwick (LGW) · Stansted (STN) · Luton (LTN) ↔ Kingsford Smith (SYD)
Flight time
≈21.5 hours outbound
Distance
≈16,994 km each way
Typical price
$1,080 round-trip (seasonal median)
Airlines on the board
Air China
Itineraries
Connections on current fares
Best months to visit
Oct–Nov · Mar–Apr

Good to know

LON → SYD, answered.

Is $731 a good price for London to Sydney?

Yes — the seasonal median for this route is around $1,080 round-trip. At $731 you're 32% below that, which we rate great for this route.

What is the cheapest month to fly from London to Sydney?

Across 7 months of cached-fare history, Nov comes out cheapest on this route. The best months to actually be in Sydney are Oct–Nov · Mar–Apr — when those overlap, that's your window.

How far in advance should I book LON → Sydney?

We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 7 months of cached fares, Nov comes out lowest on this route. Our guide Why flight prices change covers what does move a fare.

Are there nonstop flights from London to Sydney?

The current cheapest fares involve a connection, ticketed under Air China. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.

Are these prices guaranteed?

No — these are cached fares found on real searches (this one on 17 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.

Next step

Sleeping in Sydney?

Lock the flight first — then compare stays for 10–17 Nov · 7 nights.

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