We've gone through lots of different flights, to help you find the cheapest way to get from London Heathrow to Sydney. You can choose from 23 airlines. At the moment, 09 / Mar / 2025 is the cheapest date to travel, but scroll through the results to find the option that works best for you.
There are 5,390 flights from London Heathrow to or via Sydney every week. Out of the 23 available airlines, the most popular ones are Qatar Airways, Emirates & Qantas. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
Generally speaking, the flight from London Heathrow to Sydney takes around 25 hrs 50 mins. The fastest flight takes 21 hrs 45 mins to cover the 17034 km distance. You can view all flight times yourself in the results list.
June is normally the cheapest month to fly to Sydney, but it’s important to try different options when you search. Searching by month, for instance, will show you the best time of the week to fly. December is always the most expensive time to fly but, if you check regularly and book early, you have a better chance of getting a good deal.
