Cheap Flights from Sydney to London
Prices are from searches made in the last 24 hours and current prices may differ.
Do you need to catch a flight to Sydney? Check out our domestic flights to Sydney. If Sydney is not your closest airport, then here are all our flights to London from Australia and flights to United Kingdom. Maybe a different destination? Here are all the flights from Sydney
Cheapest Time of Year to Fly from Sydney to London
Return fares from Sydney to London by month, based on the cheapest return airfares found for each month.
The cheapest month to fly to London is August 2026, with return fares from $1,262 — 54% cheaper than the most expensive month (December 2026, from $2,772).
When Should You Fly to London?
Based on the fares we've tracked, August is typically the cheapest month to fly to London, with return fares from $1,262. December is the most expensive month, with the cheapest return fares around $2,772 as school holidays and the Christmas peak push prices up.
Across the year, return fares to London average around $1,689. If you can travel in the off-peak months of August, November and March, you'll generally pay up to 25% less than the yearly average.
Cheapest Sydney to London Return Prices
These are the cheapest prices for Sydney to London return airfares.
Average Sydney to London Return Prices
These are the average prices for Sydney to London return airfares.
Frequently Asked Questions about flying from Sydney to London
When is the cheapest time to travel from Sydney to London?The cheapest month to travel is typically August.
How much do return flights from Sydney to London cost?The best price we found for a return flight from Sydney to London is $1231.
What is the cheapest date to fly from Sydney to London?Currently, the cheapest date for a return flight from Sydney to London is 23 October 2026.
What is the cheapest airline that flys from Sydney to London?Currently, the cheapest airline that flys from Sydney to London is China Southern.
Which airlines fly direct from Sydney to London?British Airways and Qantas fly direct.
How long does a direct flight from Sydney to London take?The shortest direct flight usually takes 24 hours and 45 minutes.
What is the IATA airport code for London?The IATA code for London is LON.
When should you book flights to London?From our data, you should book flights to London 60 days out.
How I Want That Flight can help you
What's the benefit of using I Want That Flight for my Sydney to London flight?Think of us as your personal shortcut to a great deal. Instead of you opening fifty different tabs, we instantly cross-check rates across heaps of airlines and booking sites to score you the sweet spot on pricing. Millions of holidaymakers count on us every year to get them airborne, so you're running with a pretty savvy crowd.
Can you sort me out with direct flights from Sydney to London?100%. As soon as the page finishes loading your options, hit the "Direct" filter. The layovers will vanish, leaving you with only the non-stop routes.
How does I Want That Flight find me the best Sydney to London flights?Once you punch your details into our search tool, we unlock all kinds of handy tricks to map out your journey. We’ll map out the most budget-friendly calendar dates and takeoff slots, and let you slice and dice the data until you pinpoint the exact itinerary that works for you.
I'm still in the planning phase. Can you ping me if Sydney to London fares drop?No worries at all. Just kick off a quick search, drop your email into our price tracker, and we’ll send a heads-up straight to your inbox the moment the price drops.
Sign up to I Know The Pilot for all the latest flight deals
Join 300,000+ Australians getting the best airfares delivered to their mailbox
