Sydney to London Time Difference
London is 9 hours behind Sydney. When it is noon in Sydney, it is 03:00 in London.
Sydney (UTC+10) → London (UTC+1)
Sydney (AEDT/AEST, UTC+10/+11) runs 9–11 hours ahead of London (GMT/BST). The precise gap shifts seasonally as Australia and the UK observe DST on opposite schedules. Calls from Sydney must be placed early morning to reach London during business hours.
🕐 Interactive Time Explorer
When it's 18:00 in Sydney, it's 09:00 in London
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
Sydney & London◐ 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
Sydney
21:00
London (-1)
09:00
Sydney
00:00
London
12:00
Sydney
03:00
London
15:00
Sydney
06:00
London
18:00
Sydney
09:00
London
21:00
Sydney
12:00
London
00:00
Sydney
15:00
London (-1)
03:00
Sydney
18:00
London (-1)
Frequently Asked Questions
How many hours is Sydney ahead of London?
London is 9 hours behind Sydney. When it is 12:00 noon in Sydney, it is 03:00 in London. Sydney operates on Australia/Sydney (UTC+10), while London uses Europe/London (UTC+1).
What is the best time to call London from Sydney?
Standard business hours (9 AM–5 PM) do not overlap between Sydney and London due to the 9 hours difference. Consider early morning or late evening calls, or use async communication.
Does the Sydney to London 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 Sydney and London
The distance between Sydney and London is approximately 16,994 km. A direct flight typically takes around 21 hours. Your arrival clock will show local London time — use our Flight Time Calculator to predict exact arrival times.