Time difference between Seattle and London

London is 8 hours ahead of Seattle.

United States · Pacific Daylight Time

12:43 AM

Wednesday, October 21, 2026

United Kingdom · British Summer Time

8:43 AM

Wednesday, October 21, 2026

Seattle to London time converter

Green rows are office hours in both places; light green rows are when both are awake.

What is the time difference between Seattle and London?

London is 8 hours ahead of Seattle. Seattle is on UTC−7 and London is on UTC+1.

What time is it in London when it is 9 AM in Seattle?

When it is 9:00 AM in Seattle, it is 5:00 PM in London.

When is the best time to call London from Seattle?

The best time to call or meet is 9:00 AM–10:00 AM in Seattle (5:00 PM–6:00 PM in London), when both places are in normal office hours.

Does the time difference between Seattle and London change?

Yes. Because of daylight saving time, the difference changes on Saturday, October 24, 2026, when London will be 7 hours ahead of Seattle.

Seattle is 8 hours behind London. More: time in Seattle · time in London