Seoul → San Francisco: Time Difference
San Francisco is 16 hours behind Seoul.
How the difference works
Seoul uses Asia/Seoul (UTC+9 standard time) and San Francisco uses America/Los_Angeles (UTC-8 standard time) — a standard-time gap of 17 hours behind Seoul. San Francisco observes daylight saving time while Seoul does not, so the difference shifts by one hour twice a year.
Distance: about 9,029 km (5,610 mi) great-circle distance.
Seoul → San Francisco, hour by hour
| Seoul | San Francisco | Best hours to call |
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Frequently asked questions
What is the time difference between Seoul and San Francisco?
In standard time, San Francisco is 17 hours behind Seoul. San Francisco observes daylight saving time while Seoul does not, so the difference shifts by one hour twice a year.
When it is 9:00 in Seoul, what time is it in San Francisco?
In standard time it is 16:00 the previous day in San Francisco. During daylight saving periods the answer can move by an hour — the live table on this page always reflects today's rules.
How far is San Francisco from Seoul?
About 9,029 km (5,610 miles) as the crow flies, computed from city-center coordinates.