Money hackUse free walking tours
Tip-based walking tours run in most big cities and are a great first-day introduction with a local guide.
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✈️ Cheap flights from Sydney to London
Compare Sydney – London fares from hundreds of airlines and travel sites. The trip is about 17,020 km and takes around 21 h 10 min nonstop (most flights stop once).
📏 Distance17,020 km (10,576 miles)
⏱️ Flight timeabout 21 h 10 min nonstop – most trips need one stop
🕒 Time differenceLondon is 10 hours behind Sydney
🛫 AirportsSYD → LHR, LGW, STN, LTN, LCY, SEN
💸 Cheapest monthNov 2026 – from $916
📅 Cheapest months to fly Sydney → London
- $916Nov 26
- $1,275Dec 26
- $1,054Mar 27
Lowest fares our Fare agent saw for each month. Prices change daily.
🌞 Best time to visit United Kingdom
Best: May-September – the longest, warmest days for hiking, festivals and coastal trips; Scotland's long summer evenings are magical.
Shoulder season: April and October – fewer crowds, spring blossom or autumn colour, and generally mild weather.
Weather by month in London
- 8°Jan⛅
- 9°Feb⛅
- 12°Mar⛅
- 15°Apr⛅
- 18°May⛅
- 22°Jun⛅
- 24°Jul⛅
- 23°Aug⛅
- 20°Sep⛅
- 16°Oct🌧
- 11°Nov🌧
- 9°Dec🌧
Average daytime highs (°C) and how rainy each month is.
📍 Things to do when you land
- London's free museums – Wander the British Museum, Natural History Museum and Tate Modern without paying an entry fee.
- See a West End show – Catch a musical or play in the theatre district that rivals Broadway.
- Stonehenge at sunrise – Watch dawn light strike the great stones on Salisbury Plain, ideally around the solstice.
- Edinburgh Castle – Climb the Royal Mile to a fortress perched on a volcanic crag high above Scotland's capital.
United Kingdom travel guide → All flights to United Kingdom →
💡 Tips for a cheaper ticket
Planning hackSlow down to save
Staying longer in fewer places cuts transport costs and unlocks weekly discounts on stays.
Flights hackCarry-on only
Travel with one cabin bag and you skip baggage fees, check-in queues and the risk of lost luggage.
Sydney to London flights: questions
How long is the flight from Sydney to London?
A nonstop flight from Sydney to London takes about 21 h 10 min for the 17,020 km (10,576 miles) trip. Few airlines fly this distance nonstop, so most itineraries include one stop and take several hours longer.
How far is London from Sydney?
London is about 17,020 km (10,576 miles) from Sydney as the plane flies.
What is the time difference between Sydney and London?
Right now London is 10 hours behind Sydney. Daylight saving changes can shift this by an hour during the year.
What is the cheapest month to fly from Sydney to London?
Recently the lowest fares were in Nov 2026, from about $916. Prices change daily.
Which airports serve Sydney and London?
From Sydney: Sydney Kingsford Smith Intl (SYD). In London: London Heathrow (LHR), London Gatwick (LGW), London Stansted (STN), London Luton (LTN), London City (LCY), London Southend (SEN).
Do I need a visa for United Kingdom?
It depends on your passport – see our United Kingdom visa & entry guide.
More flights from Sydney
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