How Long Does It Take to Fly from London to Sydney?
Quick Answer
A flight from London to Sydney typically takes 22–25 hours total travel time, including one stopover. There are no direct commercial flights on this route.
Typical Duration
Quick Answer
Flying from London Heathrow to Sydney Kingsford Smith Airport takes approximately 22–25 hours of total travel time, including at least one stopover. The great-circle distance between the two cities is roughly 10,573 miles (17,016 km), making it one of the longest air routes in the world.
Flight Time Breakdown
| Route Option | Stopover City | Total Travel Time | Typical Airlines |
|---|---|---|---|
| Via Singapore | Singapore (SIN) | 22–23 hours | Qantas, Singapore Airlines |
| Via Dubai | Dubai (DXB) | 22–24 hours | Emirates |
| Via Doha | Doha (DOH) | 23–25 hours | Qatar Airways |
| Via Hong Kong | Hong Kong (HKG) | 23–25 hours | Cathay Pacific |
| Via Los Angeles | Los Angeles (LAX) | 24–27 hours | Qantas, British Airways |
Why No Direct Flights?
As of 2026, no airline operates a nonstop London–Sydney service. The distance exceeds the range of most commercial aircraft. However, Qantas has been developing its "Project Sunrise" initiative, which aims to launch nonstop flights between Sydney and London using Airbus A350-1000 aircraft. These ultra-long-haul flights would cut travel time to approximately 19–20 hours.
Factors That Affect Total Travel Time
Layover duration is the single biggest variable. A short connection of 1–2 hours can keep your total journey under 23 hours, while a longer layover of 4–8 hours can push total travel time past 28 hours.
Jet stream and wind patterns also play a role. Flights heading eastbound from London tend to benefit from tailwinds, while westbound routings via Los Angeles may encounter headwinds.
Time of year can influence scheduling. During peak travel seasons (December–January and June–August), airlines often add frequencies, giving travellers more connection options and potentially shorter layovers.
Tips for the Journey
- Book flights with short layovers through hub airports like Singapore or Dubai to minimise total travel time.
- Consider a stopover holiday. Many airlines offer free or discounted stopovers in their hub city, turning a long journey into a two-destination trip.
- Stay hydrated and move regularly. On flights this long, drink water frequently and walk the cabin every few hours to reduce the risk of deep vein thrombosis.
- Adjust your sleep schedule a day or two before departure to help manage the 10–11-hour time difference between London and Sydney.
Time Zone Considerations
Sydney is 10–11 hours ahead of London, depending on daylight saving time. A flight departing London in the evening typically arrives in Sydney two calendar days later in the morning, which can make the journey feel even longer than it is.
Summary
While the London-to-Sydney route is one of the world's longest, careful airline and layover selection can keep your total travel time between 22 and 25 hours. With Qantas's Project Sunrise on the horizon, nonstop flights of around 19–20 hours may soon become a reality.