London to Seoul time
See exactly what time it is in Seoul the moment the clock strikes any hour in London, with British Summer Time handled automatically so your calls and meetings land on the right slot.
Enter a valid date and time.
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Eight or nine hours ahead — Seoul is always in front
Seoul runs on KST (UTC+9) all year and never shifts for daylight saving. London sits on GMT (UTC+0) in winter and jumps to BST (UTC+1) from the last Sunday of March to the last Sunday of October. So Seoul is 9 hours ahead of London in winter and 8 hours ahead in summer. The gap moves only because London changes its clocks — Seoul stays put, which is why the difference flips by an hour in late March and late October each year.
Worked examples for summer and winter
In summer, when London is on British Summer Time, 9 AM in London is 5 PM the same day in Seoul. In winter, when London falls back to GMT, that same 9 AM becomes 6 PM in Seoul. Push the meeting earlier to 8 AM London and it lands at 4 PM in summer or 5 PM in winter — still comfortably inside Korean office hours, and always on the same calendar day, since Seoul only ever runs a fraction of a day ahead.
Calls, live streams, and flights
Use it to schedule calls with Korean colleagues, catch a family member before Seoul slips into evening, or time a K-pop live stream or sports broadcast coming out of Korea. A nonstop flight between London and Seoul takes about 11 hours, so this gap is roughly what you cross in the air. Because only the UK observes daylight saving, the converter reads the offset for the exact date you enter — you never have to remember whether BST is currently on.
Frequently asked questions
Is London 8 or 9 hours behind Seoul?
Both, depending on the season. In winter, when London is on GMT (UTC+0), it is 9 hours behind Seoul. In summer, when London switches to British Summer Time (BST, UTC+1), it is 8 hours behind. Seoul is always ahead in either case.
How does daylight saving change the gap?
The UK runs BST from the last Sunday of March to the last Sunday of October, which shrinks the gap to 8 hours; the rest of the year it is 9 hours. Korea has no daylight saving and stays on UTC+9 year-round. The tool applies the correct offset for whatever date you enter, so values stay right even around the switch.
When is a good time to schedule a London-Seoul meeting?
Because Seoul is 8-9 hours ahead, its workday is already winding down as London's begins. Aim for a London morning slot: 9 AM in London is 5-6 PM in Seoul, which is still within business hours there.