Chicago and Seoul time difference
Seoul is 14 hours ahead of Chicago for most of the year.
Plan a meeting in Chicago and SeoulOpens the free planner with both cities: drag the bands to any day and time, add more cities, and share the result.
Their 09:00–17:00 work days do not overlap: 09:00 in Chicago is 23:00 in Seoul, and 17:00 in Chicago is 07:00 there. A meeting needs an early start or a late finish on one side.
Hour by hour
On a usual work day (October 14, 2026). Green is 09:00–17:00 work time, dark is night (21:00–07:00).
| Chicago | Seoul |
|---|---|
| , Night | , Work hours |
| , Night | , Work hours |
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| , Night | , Off hours |
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| , Off hours | , Night |
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| , Work hours | , Night |
| , Work hours | next day, Night |
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| , Work hours | next day, Night |
| , Off hours | next day, Off hours |
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| , Night | next day, Work hours |
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Through the year
| Dates | Difference |
|---|---|
| October 8, 2026–October 31, 2026 | Seoul is 14 hours ahead of Chicago |
| November 1, 2026–March 13, 2027 | Seoul is 15 hours ahead of Chicago |
| March 14, 2027–October 7, 2027 | Seoul is 14 hours ahead of Chicago |
Clock changes
Chicago: November 1, 2026: clocks go back 1 hour; March 14, 2027: clocks go forward 1 hour.
Seoul does not change its clocks.
Questions
What time is it in Seoul when it is 09:00 in Chicago?
On a usual day it is 23:00 in Seoul.
Do Chicago and Seoul change their clocks on the same day?
Only Chicago changes its clocks, so the difference changes with its summer time; see the table above.
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Seoul
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- Buenos Aires and Seoul
- London and Seoul
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- Seoul and Shanghai
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