London to Sydney Time Difference

Sydney is 9 hours ahead of London. When it is noon in London, it is 21:00 in Sydney.

London (UTC+1)Sydney (UTC+10)

London (GMT/BST) and Sydney (AEST/AEDT) sit 9–11 hours apart depending on each city's DST cycle. The gap is smallest when both cities are near summer simultaneously and largest when seasons diverge. Business-hour overlap is minimal — the ASX typically closes before the LSE opens each day.

London

United Kingdom

⏱️9 hours ahead
04:45

Sat, Apr 25

📞 +44💱 GBP

Sydney

Australia

13:45

Sat, Apr 25

📞 +61💱 AUD

🕐 Interactive Time Explorer

When it's 03:00 in London, it's 12:00 in Sydney

Drag the slider to see corresponding times in both cities

03:00
0:006:0012:0018:0023:00
London
03:00
Sydney
12:00
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🤝 Best Meeting Times

London & Sydney
Times shown in London time
Excellent - Both in office
Good - Flexible hours

◐ Extended Hours (5 hours)

✈️ Travel Information

Distance

16,994 km

Est. Flight Time

~21h

Time Difference

+9h

Work Hours Overlap

0h

None

🔴 Office Closed

No overlap available

No overlap

⏰ Quick Conversion

06:00

London

15:00

Sydney

09:00

London

18:00

Sydney

12:00

London

21:00

Sydney

15:00

London

00:00

Sydney (+1)

18:00

London

03:00

Sydney (+1)

21:00

London

06:00

Sydney (+1)

00:00

London

09:00

Sydney

03:00

London

12:00

Sydney

Frequently Asked Questions

How many hours is London behind Sydney?

Sydney is 9 hours ahead of London. When it is 12:00 noon in London, it is 21:00 in Sydney. London operates on Europe/London (UTC+1), while Sydney uses Australia/Sydney (UTC+10).

What is the best time to call Sydney from London?

Standard business hours (9 AM–5 PM) do not overlap between London and Sydney due to the 9 hours difference. Consider early morning or late evening calls, or use async communication.

Does the London to Sydney time difference change throughout the year?

The time difference can shift by up to one hour when either city observes Daylight Saving Time (DST). DST transition dates differ between countries — typically March/April in the Northern Hemisphere and October in the Southern Hemisphere. Always verify the live difference above when scheduling important meetings near DST changeover dates.

Flying between London and Sydney

The distance between London and Sydney is approximately 16,994 km. A direct flight typically takes around 21 hours. Your arrival clock will show local Sydney time — use our Flight Time Calculator to predict exact arrival times.