Chicago is currently 14 hours behind of Seoul. Seoul is on UTC+9 and Chicago is on UTC-5.
Because Seoul and Chicago do not start and end daylight saving time together, the gap between them is not constant. Over the next twelve months it takes 2 different values.
| Seoul | Chicago |
|---|---|
| 12:00 AM | 9:00 AM (previous day) |
| 1:00 AM | 10:00 AM (previous day) |
| 2:00 AM | 11:00 AM (previous day) |
| 3:00 AM | 12:00 PM (previous day) |
| 4:00 AM | 1:00 PM (previous day) |
| 5:00 AM | 2:00 PM (previous day) |
| 6:00 AM | 3:00 PM (previous day) |
| 7:00 AM | 4:00 PM (previous day) |
| 8:00 AM | 5:00 PM (previous day) |
| 9:00 AM | 6:00 PM (previous day) |
| 10:00 AM | 7:00 PM (previous day) |
| 11:00 AM | 8:00 PM (previous day) |
| 12:00 PM | 9:00 PM (previous day) |
| 1:00 PM | 10:00 PM (previous day) |
| 2:00 PM | 11:00 PM (previous day) |
| 3:00 PM | 12:00 AM |
| 4:00 PM | 1:00 AM |
| 5:00 PM | 2:00 AM |
| 6:00 PM | 3:00 AM |
| 7:00 PM | 4:00 AM |
| 8:00 PM | 5:00 AM |
| 9:00 PM | 6:00 AM |
| 10:00 PM | 7:00 AM |
| 11:00 PM | 8:00 AM |
| Seoul | Chicago |
|---|---|
| 12:00 AM | 10:00 AM (previous day) |
| 1:00 AM | 11:00 AM (previous day) |
| 2:00 AM | 12:00 PM (previous day) |
| 3:00 AM | 1:00 PM (previous day) |
| 4:00 AM | 2:00 PM (previous day) |
| 5:00 AM | 3:00 PM (previous day) |
| 6:00 AM | 4:00 PM (previous day) |
| 7:00 AM | 5:00 PM (previous day) |
| 8:00 AM | 6:00 PM (previous day) |
| 9:00 AM | 7:00 PM (previous day) |
| 10:00 AM | 8:00 PM (previous day) |
| 11:00 AM | 9:00 PM (previous day) |
| 12:00 PM | 10:00 PM (previous day) |
| 1:00 PM | 11:00 PM (previous day) |
| 2:00 PM | 12:00 AM |
| 3:00 PM | 1:00 AM |
| 4:00 PM | 2:00 AM |
| 5:00 PM | 3:00 AM |
| 6:00 PM | 4:00 AM |
| 7:00 PM | 5:00 AM |
| 8:00 PM | 6:00 AM |
| 9:00 PM | 7:00 AM |
| 10:00 PM | 8:00 AM |
| 11:00 PM | 9:00 AM |
With a working day of 9:00 AM to 6:00 PM on both sides there is no overlap at all between Seoul and Chicago. One side has to take the call outside office hours, so the usual compromise is early morning in the west or late evening in the east.
Chicago is 14 hours behind of Seoul right now. That gap is not constant through the year, because the two places change their clocks on different dates.
9:00 AM in Seoul is 7:00 PM the previous day in Chicago.
There is no overlap between a 9:00 AM to 6:00 PM working day in Seoul and the same in Chicago. One side has to meet outside office hours.
For the current time on its own, with the daylight saving dates that apply and the working week in that country, see time in Seoul or time in Chicago.