Ulsan to Chicago Time Difference
Chicago is 14 hours behind Ulsan. When it is noon in Ulsan, it is 22:00 in Chicago.
Seoul (UTC+9) → Chicago (UTC-5)
🕐 Interactive Time Explorer
When it's 17:00 in Ulsan, it's 03:00 in Chicago
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
Ulsan & Chicago◐ Extended Hours (3 hours)
✈️ Travel Information
Distance
10,621 km
Est. Flight Time
~13.5h
Time Difference
-14h
Work Hours Overlap
0h
None
🔴 Office Closed
No overlap available
No overlap
⏰ Quick Conversion
06:00
Ulsan
16:00
Chicago (-1)
09:00
Ulsan
19:00
Chicago (-1)
12:00
Ulsan
22:00
Chicago (-1)
15:00
Ulsan
01:00
Chicago
18:00
Ulsan
04:00
Chicago
21:00
Ulsan
07:00
Chicago
00:00
Ulsan
10:00
Chicago (-1)
03:00
Ulsan
13:00
Chicago (-1)
Frequently Asked Questions
How many hours is Ulsan ahead of Chicago?
Chicago is 14 hours behind Ulsan. When it is 12:00 noon in Ulsan, it is 22:00 in Chicago. Ulsan operates on Asia/Seoul (UTC+9), while Chicago uses America/Chicago (UTC-5).
What is the best time to call Chicago from Ulsan?
Standard business hours (9 AM–5 PM) do not overlap between Ulsan and Chicago due to the 14 hours difference. Consider early morning or late evening calls, or use async communication.
Does the Ulsan to Chicago time difference change throughout the year?
The time difference can shift by up to one hour when either city observes Daylight Saving Time (DST). DST transition dates differ between countries — typically March/April in the Northern Hemisphere and October in the Southern Hemisphere. Always verify the live difference above when scheduling important meetings near DST changeover dates.
Flying between Ulsan and Chicago
The distance between Ulsan and Chicago is approximately 10,621 km. A direct flight typically takes around 13.5 hours. Your arrival clock will show local Chicago time — use our Flight Time Calculator to predict exact arrival times.