London to San Francisco Time Difference
San Francisco is 8 hours behind London. When it is noon in London, it is 04:00 in San Francisco.
London (UTC+1) → Los Angeles (UTC-7)
🕐 Interactive Time Explorer
When it's 09:00 in London, it's 01:00 in San Francisco
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
London & San Francisco◐ Extended Hours (7 hours)
✈️ Travel Information
Distance
8,617 km
Est. Flight Time
~11.1h
Time Difference
-8h
Work Hours Overlap
0h
None
🔴 Office Closed
No overlap available
No overlap
⏰ Quick Conversion
06:00
London
22:00
San Francisco (-1)
09:00
London
01:00
San Francisco
12:00
London
04:00
San Francisco
15:00
London
07:00
San Francisco
18:00
London
10:00
San Francisco
21:00
London
13:00
San Francisco
00:00
London
16:00
San Francisco (-1)
03:00
London
19:00
San Francisco (-1)
Frequently Asked Questions
How many hours is London ahead of San Francisco?
San Francisco is 8 hours behind London. When it is 12:00 noon in London, it is 04:00 in San Francisco. London operates on Europe/London (UTC+1), while San Francisco uses America/Los Angeles (UTC-7).
What is the best time to call San Francisco from London?
There is 1 hour of overlapping business time (9 AM–5 PM) between London and San Francisco. The best window is 17:00–18:00 London time (09:00–10:00 in San Francisco).
Does the London to San Francisco 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 San Francisco
The distance between London and San Francisco is approximately 8,617 km. A direct flight typically takes around 11.1 hours. Your arrival clock will show local San Francisco time — use our Flight Time Calculator to predict exact arrival times.