Seattle to London Time Difference
London is 8 hours ahead of Seattle. When it is noon in Seattle, it is 20:00 in London.
Los Angeles (UTC-7) → London (UTC+1)
Seattle (PST/PDT, UTC−8/−7) is 8 hours behind London (GMT/BST). Both cities change clocks on similar schedules, keeping the gap at 8 hours year-round. Seattle must schedule calls with London early morning (6:00–9:00 AM PST) to reach London during its business hours (2:00–5:00 PM GMT).
🕐 Interactive Time Explorer
When it's 05:00 in Seattle, it's 13:00 in London
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
Seattle & London◐ Extended Hours (7 hours)
✈️ Travel Information
Distance
7,699 km
Est. Flight Time
~10.1h
Time Difference
+8h
Work Hours Overlap
0h
None
🔴 Office Closed
No overlap available
No overlap
⏰ Quick Conversion
06:00
Seattle
14:00
London
09:00
Seattle
17:00
London
12:00
Seattle
20:00
London
15:00
Seattle
23:00
London
18:00
Seattle
02:00
London (+1)
21:00
Seattle
05:00
London (+1)
00:00
Seattle
08:00
London
03:00
Seattle
11:00
London
Frequently Asked Questions
How many hours is Seattle behind London?
London is 8 hours ahead of Seattle. When it is 12:00 noon in Seattle, it is 20:00 in London. Seattle operates on America/Los Angeles (UTC-7), while London uses Europe/London (UTC+1).
What is the best time to call London from Seattle?
Standard business hours (9 AM–5 PM) do not overlap between Seattle and London due to the 8 hours difference. Consider early morning or late evening calls, or use async communication.
Does the Seattle 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 Seattle and London
The distance between Seattle and London is approximately 7,699 km. A direct flight typically takes around 10.1 hours. Your arrival clock will show local London time — use our Flight Time Calculator to predict exact arrival times.