Los Angeles to Seoul time
Convert between Los Angeles and Seoul time in real time — daylight saving handled automatically — so you can line up calls and meetings at a glance.
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Los Angeles to Seoul: is it 16 or 17 hours?
Seoul always runs the better part of a day ahead of Los Angeles. Seoul (KST, UTC+9) never observes daylight saving time, while Los Angeles sits in the Pacific zone and shifts to PDT from the second Sunday in March to the first Sunday in November. When LA is on daylight time, the gap narrows to 16 hours; once it falls back to standard time (PST) for the winter, the gap widens to 17 hours. Because Seoul never touches its clocks, that 16-versus-17-hour swing is driven entirely by LA's daylight-saving switch. The converter above applies the correct offset for whatever date you pick.
A worked example: 9 AM in each city
Say it's summer and Los Angeles is on daylight time: 9 AM in LA lands at 1 AM the next day in Seoul (9 + 16 hours). In winter, that same 9 AM in LA becomes 2 AM the next day in Seoul (9 + 17 hours). Flip the direction and it's just as handy — to hold a 10 AM meeting in Seoul, someone in LA joins at 6 PM the previous day in summer, or 5 PM the previous day in winter. A single calendar date can shift things by an hour near a DST boundary, so enter the exact day and let the tool confirm it.
For calls, flights, and live streams
This pairing trips people up because most of LA's working day falls in the dead of night or the pre-dawn hours in Seoul. To reach a Korean family member, client, or support line during Seoul's 9-to-6 workday, your best window from LA is late afternoon or evening the day before. The same offset matters when you're checking the local arrival time of a flight into Incheon, or converting the kickoff of a Korea-based esports match, KBO baseball game, or live stream into LA time. Drop the date and time into the converter and it settles the daylight-saving question for you.
Frequently asked questions
How many hours is Seoul ahead of Los Angeles?
Seoul is 16 to 17 hours ahead of Los Angeles. It's 16 hours while LA is on daylight saving time (March to November) and 17 hours during LA's winter standard time. Seoul stays fixed at UTC+9 all year because Korea doesn't use daylight saving.
Why does the difference switch between 16 and 17 hours?
Los Angeles moves its clocks forward an hour for daylight saving, but Seoul has no such system and stays put. So when LA springs forward in spring, the gap shrinks to 16 hours; when daylight time ends in late autumn, it stretches back to 17 hours.
What time is 9 AM in LA in Seoul?
In summer (LA on daylight time) it's 1 AM the next day in Seoul; in winter (standard time) it's 2 AM the next day. Either way the date rolls over by one day. Enter your target date in the converter above and it decides automatically whether daylight saving applies.