Time difference between Seattle and Seoul

Seoul is 16 hours ahead of Seattle.

United States · Pacific Daylight Time

12:42 AM

Wednesday, October 21, 2026

South Korea · Korean Standard Time

4:42 PM

Wednesday, October 21, 2026

Seattle to Seoul 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 Seoul?

Seoul is 16 hours ahead of Seattle. Seattle is on UTC−7 and Seoul is on UTC+9.

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

When it is 9:00 AM in Seattle, it is 1:00 AM the next day in Seoul.

When is the best time to call Seoul from Seattle?

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

Does the time difference between Seattle and Seoul change?

Yes. Because of daylight saving time, the difference changes on Sunday, November 1, 2026, when Seoul will be 17 hours ahead of Seattle.

Seattle is 16 hours behind Seoul. More: time in Seattle · time in Seoul