Cheap flights from London to Sydney

October is the cheapest month on this route, and it lands in a sweet spot: Sydney is in spring and the Christmas rush has not begun. Fares climb through December and January, when Australians fly home for the summer holidays and London empties for Christmas, then ease again in February and March. Midweek departures from Heathrow, Gatwick or Stansted usually undercut Friday and Sunday flights. Because every itinerary connects, book a few months ahead so the long legs and the short hop line up, and check the price calendar before you commit to dates.

Ten carriers sell this route, and all of them connect rather than fly non-stop. Qatar Airways routes you through the Gulf, while China Eastern, China Southern, Air China, Hainan Airlines and Tianjin Airlines usually go through Chinese hubs. Air India and Indigo connect in India, Srilankan Airlines in South Asia, and Edelweiss Air through Zurich. Indigo is the low-cost name in that list, so a checked bag and a meal are extras, while the full-service carriers normally fold baggage and food into the fare. On a trip this long, the connection time matters as much as the ticket price.

Sydney has a single international gateway, Kingsford Smith, and it sits a short drive south of the city centre, so a taxi or rideshare into town is quick outside peak hours. The airport train is the easiest way in with hand luggage only and drops you in the central business district. If your trip continues elsewhere in Australia, remember that the international and domestic terminals are separate, so leave time for the transfer. Biosecurity checks are strict: declare any food, plant or wood material you are carrying.

Currency

AUD (A$)

Power sockets

Type I · 230 V

Language

English

Emergency number

000

Calling code

+61

Internet domain

.au

Population of Sydney

5.5 M (2023)

Time zone

UTC+10 (Australia/Sydney)

Country facts: Wikidata

• Which London airport you leave from, since Heathrow, Gatwick, Stansted, Luton and London City are far apart.
• Whether your checked bag is part of the fare or an add-on, especially on the low-cost leg.
• Whether the whole trip sits on one ticket or two, because a self-transfer means collecting bags and checking in again.
• Australian entry rules, so sort your visa or electronic travel authority before you fly.
• October fares against the December school holidays, when prices on this route climb.