Chicago to Seoul: time difference and best times to meet
Seoul is 15 hours ahead of Chicago. There is no overlap between a normal working day in each city, so one side has to take the call outside working hours.
America/Chicago
Asia/Seoul
Chicago and Seoul time difference
This live comparison uses the current time-zone rules for both cities, so it reflects daylight-saving changes as well as the usual Chicago and Seoul clock gap. Set your working hours below to see the practical overlap before proposing a meeting.
Hour-by-hour overlap
Each row is one hour of the Chicago day and the matching hour in Seoul. Adjust the working hours to match how your team actually works.
| Chicago | Seoul | Suitable? |
|---|---|---|
| 12am | 3pm | Working hours in Seoul only |
| 1am | 4pm | Working hours in Seoul only |
| 2am | 5pm | Working hours in Seoul only |
| 9am | 12am | Working hours in Chicago only |
| 10am | 1am | Working hours in Chicago only |
| 11am | 2am | Working hours in Chicago only |
| 12pm | 3am | Working hours in Chicago only |
| 1pm | 4am | Working hours in Chicago only |
| 2pm | 5am | Working hours in Chicago only |
| 3pm | 6am | Working hours in Chicago only |
| 4pm | 7am | Working hours in Chicago only |
| 5pm | 8am | Working hours in Chicago only |
| 6pm | 9am | Working hours in Seoul only |
| 7pm | 10am | Working hours in Seoul only |
| 8pm | 11am | Working hours in Seoul only |
| 9pm | 12pm | Working hours in Seoul only |
| 10pm | 1pm | Working hours in Seoul only |
| 11pm | 2pm | Working hours in Seoul only |
When the gap changes in the next twelve months
- Sunday, March 14, 2027 — Seoul goes from 15 hours ahead of to 14 hours ahead of Chicago.
Recurring meetings set as a fixed clock time in one city will move by an hour for the other on that date.
Public holidays to avoid
Dates where one side is off work while the other is not are the most common cause of no-shows on this route.
- Wednesday, November 11, 2026 — Veterans Day — Chicago is off, Seoul is working.
- Thursday, November 26, 2026 — Thanksgiving Day — Chicago is off, Seoul is working.
- Friday, December 25, 2026 — Christmas Day and Christmas Day; both cities are off.
Chicago and Seoul have no shared working hours, so a recurring live meeting always costs someone their morning or their evening. Rotating the burden, or moving the update to written form, is usually the better answer.
Sending a booking link avoids the arithmetic entirely: each side picks a time in their own zone and both calendars get the correct local time, including after a daylight-saving change. See how LemCall handles cross-timezone bookings.
Frequently asked questions
- What is the time difference between Chicago and Seoul?
- Seoul is currently 15 hours ahead of Chicago. That changes to 14 hours ahead of on Sunday, March 14, 2027, when one side shifts for daylight saving.
- When is the best time to schedule a meeting between Chicago and Seoul?
- There is no hour where both cities are inside normal working hours, so one side has to take the call early or late.
- How many hours do Chicago and Seoul overlap?
- Zero, on a standard 9–18 working day in each city.
- Does daylight saving change the Chicago–Seoul gap?
- Yes. Over the next twelve months the difference changes 1 time: Sunday, March 14, 2027 (15 hours ahead of becomes 14 hours ahead of).
- Are there public holidays that affect Chicago–Seoul meetings?
- Yes. The next is Wednesday, November 11, 2026 — a public holiday where Chicago is, but a normal working day in Seoul.
Nearby pairs
Other meeting-time pages for Chicago
- Chicago ↔ Melbourne2 hours of overlap
- Chicago ↔ DubaiNo working-hours overlap
- Chicago ↔ MumbaiNo working-hours overlap
- Chicago ↔ BangaloreNo working-hours overlap
- Chicago ↔ SingaporeNo working-hours overlap
- Chicago ↔ Hong KongNo working-hours overlap
- Chicago ↔ TokyoNo working-hours overlap
- Chicago ↔ ShanghaiNo working-hours overlap
Sources
- 1.IANA. Time Zone Database
- 2.Nager.Date. Public holidays API · Retrieved