Seoul to San Antonio Time Difference
San Antonio is 14 hours behind Seoul. When it's 11:20:16 PM in Seoul, it's 09:20:16 AM in San Antonio.
How Many Hours Behind Is San Antonio From Seoul?
San Antonio is 14 hours behind Seoul. So Seoul is 14 hours ahead of San Antonio looking the other way — the same gap, described from the other end.
In practice that means a working day in Seoul starts when it is already 7:00 PM the previous day in San Antonio. The gap is not fixed all year: it becomes 15 hours on Sunday, November 1, 2026, when San Antonio changes its clocks.
Best Time to Call Seoul and San Antonio
Standard 9-to-5 hours in Seoul and San Antonio never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 12:00 PM in Seoul, which is 5:00 PM to 10:00 PM in San Antonio.
both at work Seoul only San Antonio only neither — hours shown along the strip are Seoul local time.
Convert a Specific Time
Pick any date and time in Seoul to see the exact equivalent in San Antonio.
Common Times Converted
Seoul time on the left, San Antonio time on the right.
Seoul to San Antonio: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Seoul. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Seoul | San Antonio | Working hours |
|---|---|---|
| 12:00 AM | 10:00 AM prev day | San Antonio only |
| 1:00 AM | 11:00 AM prev day | San Antonio only |
| 2:00 AM | 12:00 PM prev day | San Antonio only |
| 3:00 AM | 1:00 PM prev day | San Antonio only |
| 4:00 AM | 2:00 PM prev day | San Antonio only |
| 5:00 AM | 3:00 PM prev day | San Antonio only |
| 6:00 AM | 4:00 PM prev day | San Antonio only |
| 7:00 AM | 5:00 PM prev day | — |
| 8:00 AM | 6:00 PM prev day | — |
| 9:00 AM | 7:00 PM prev day | Seoul only |
| 10:00 AM | 8:00 PM prev day | Seoul only |
| 11:00 AM | 9:00 PM prev day | Seoul only |
| 12:00 PM | 10:00 PM prev day | Seoul only |
| 1:00 PM | 11:00 PM prev day | Seoul only |
| 2:00 PM | 12:00 AM | Seoul only |
| 3:00 PM | 1:00 AM | Seoul only |
| 4:00 PM | 2:00 AM | Seoul only |
| 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 | San Antonio only |
Understanding the Seoul – San Antonio Time Difference
Seoul runs on Asia/Seoul, currently KST (UTC+9:00). San Antonio runs on America/Chicago, currently CDT (UTC-5:00). The gap of 14 hours is simply the distance between those two offsets.
San Antonio observes Daylight Saving Time and Seoul does not, so the gap between them shifts by an hour twice a year. The next shift is on Sunday, November 1, 2026, when San Antonio adjusts its clocks and the difference becomes 15 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
Seoul today
San Antonio today
Frequently Asked Questions
What is the time difference between Seoul and San Antonio?
San Antonio is currently 14 hours behind Seoul. That gap becomes 15 hours on Sunday, November 1, 2026, when San Antonio changes its clocks.
How many hours behind is San Antonio from Seoul?
San Antonio is 14 hours behind Seoul. Looking at it the other way, Seoul is 14 hours ahead of San Antonio.
What time is it in San Antonio when it is 9:00 AM in Seoul?
When it is 9:00 AM in Seoul, it is 7:00 PM the previous day in San Antonio.
Is San Antonio ahead of or behind Seoul?
San Antonio is 14 hours behind Seoul. Seoul reaches each point in the day first, so San Antonio is still getting started while the Seoul working day is finishing.
What is the best time to call between Seoul and San Antonio?
Standard business hours in Seoul and San Antonio do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 12:00 PM in Seoul, which is 5:00 PM to 10:00 PM in San Antonio.
Does the time difference between Seoul and San Antonio change during the year?
Yes. San Antonio observes Daylight Saving Time and Seoul does not, so the gap between them shifts during the year. It changes to 15 hours on Sunday, November 1, 2026.
What time zones are Seoul and San Antonio in?
Seoul uses the Asia/Seoul time zone, currently KST (UTC+9:00). San Antonio uses America/Chicago, currently CDT (UTC-5:00).