Time difference between Seoul and Honolulu: 19 hours
Seoul
South Korea · UTC+9
--:--:--
Honolulu
United States (Hawaii) · UTC-10
--:--:--
Seoul is 19 hours ahead of Honolulu
Best time for a call or meeting
Seoul 09:00–13:00 = Honolulu 14:00–18:00
Both cities are within business hours (9:00–18:00).
Convert a specific time
→ Honolulu
Hour-by-hour conversion
| Seoul | Honolulu |
|---|---|
| 00:00 | 05:00 |
| 01:00 | 06:00 |
| 02:00 | 07:00 |
| 03:00 | 08:00 |
| 04:00 | 09:00 |
| 05:00 | 10:00 |
| 06:00 | 11:00 |
| 07:00 | 12:00 |
| 08:00 | 13:00 |
| 09:00 | 14:00 |
| 10:00 | 15:00 |
| 11:00 | 16:00 |
| 12:00 | 17:00 |
| 13:00 | 18:00 |
| 14:00 | 19:00 |
| 15:00 | 20:00 |
| 16:00 | 21:00 |
| 17:00 | 22:00 |
| 18:00 | 23:00 |
| 19:00 | 00:00 |
| 20:00 | 01:00 |
| 21:00 | 02:00 |
| 22:00 | 03:00 |
| 23:00 | 04:00 |
Business hours 9–18 Waking hours 7–22 Night / early morning
Daylight saving time can change the difference by season. Shown values reflect the current offset.
Frequently asked questions
How many hours is the time difference between Seoul and Honolulu?
Seoul is 19 hours ahead of Honolulu. When it is 12:00 noon in Seoul, it is 17:00 (previous day) in Honolulu.
Does daylight saving time affect the difference?
No. Neither place observes daylight saving time, so the difference stays the same all year.
What is the best time for a call or meeting?
Seoul 09:00–13:00 = Honolulu 14:00–18:00. Both cities are within business hours (9:00–18:00).