London to Seattle Time

London is 8 hours ahead of Seattle.

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Tap a city name to search and change it (partial names work). Drag the timeline (12 hours in view, scrolls forever). Keyboard: ← → , PgUp / PgDn 1 hour, Home = now.

London time to Seattle time

London is 8 hours ahead of Seattle. When it is 9:00 AM in London, UK, it is 1:00 AM in Seattle, USA. Standard 9 AM to 6 PM working hours overlap for 1 hour: 5:00 PM to 6:00 PM in London (9:00 AM to 10:00 AM in Seattle).

Time difference

8 hours (London ahead). London uses BST; Seattle uses PDT.

Working-hours overlap

1 hour of shared 9 AM to 6 PM hours.

Daylight saving

Next change: Sun, Oct 25, 2026 (London).

London to Seattle time conversion table

Times for Fri, Oct 9, 2026. Highlighted rows fall within 9 AM to 6 PM in both cities. Drag the live converter above for any other date.
London (BST)Seattle (PDT)
12:00 AM4:00 PM (previous day)
1:00 AM5:00 PM (previous day)
2:00 AM6:00 PM (previous day)
3:00 AM7:00 PM (previous day)
4:00 AM8:00 PM (previous day)
5:00 AM9:00 PM (previous day)
6:00 AM10:00 PM (previous day)
7:00 AM11:00 PM (previous day)
8:00 AM12:00 AM
9:00 AM1:00 AM
10:00 AM2:00 AM
11:00 AM3:00 AM
12:00 PM4:00 AM
1:00 PM5:00 AM
2:00 PM6:00 AM
3:00 PM7:00 AM
4:00 PM8:00 AM
5:00 PM9:00 AM
6:00 PM10:00 AM
7:00 PM11:00 AM
8:00 PM12:00 PM
9:00 PM1:00 PM
10:00 PM2:00 PM
11:00 PM3:00 PM

Daylight saving time

On Sun, Oct 25, 2026, London switches from BST to GMT, so the difference becomes 7 hours (London ahead). On Sun, Nov 1, 2026, Seattle switches from PDT to PST, so the difference becomes 8 hours (London ahead). On Sun, Mar 14, 2027, Seattle switches from PST to PDT, so the difference becomes 7 hours (London ahead). On Sun, Mar 28, 2027, London switches from GMT to BST, so the difference becomes 8 hours (London ahead).

How to use the meeting time converter

  1. Select either city name and search by city, time zone, abbreviation, or UTC offset.
  2. Drag the horizontal timeline, or use the arrow and Page Up/Page Down keys, to choose a moment.
  3. Read the matching time and date for both locations and use the color bands to compare working hours.

Frequently asked questions

What is the time difference between London and Seattle?

London is 8 hours ahead of Seattle. London currently uses BST and Seattle uses PDT.

When it is 9 AM in London, what time is it in Seattle?

It is 1:00 AM in Seattle.

What is the best time for a meeting between London and Seattle?

Standard 9 AM to 6 PM working hours overlap for 1 hour: 5:00 PM to 6:00 PM in London (9:00 AM to 10:00 AM in Seattle).

Does daylight saving time affect London and Seattle?

On Sun, Oct 25, 2026, London switches from BST to GMT, so the difference becomes 7 hours (London ahead). On Sun, Nov 1, 2026, Seattle switches from PDT to PST, so the difference becomes 8 hours (London ahead). On Sun, Mar 14, 2027, Seattle switches from PST to PDT, so the difference becomes 7 hours (London ahead). On Sun, Mar 28, 2027, London switches from GMT to BST, so the difference becomes 8 hours (London ahead).

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