Time in Seoul and Ontario
The time difference between Seoul and Ontario, California, is 16 hours. Ontario is 16 hours behind Seoul.
This means 9am in Seoul is 5pm in Ontario (previous day) and 5pm in Seoul is 1am in Ontario.
Seoul
- The current local time in Seoul is 6:43 pm (June 23, 2026)
- Seoul is in the Korea Standard Time Zone
- The time zone offset for Seoul, South Korea, is UTC+09:00
Ontario
- The current local time in Ontario is 2:43 am (June 23, 2026)
- Ontario is in the Pacific Daylight Time Zone
- The time zone offset for Ontario, United States, is UTC-07:00
How to convert Seoul time to Ontario time?
Subtract 16 hours from Seoul time to get Ontario time.
Time in Seoul
00:00
Time in Ontario
00:00
Use the slider above to convert Seoul time to Ontario time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| Seoul | Ontario |
|---|---|
| 12am | 8am |
| 1am | 9am |
| 2am | 10am |
| 3am | 11am |
| 4am | 12pm |
| 5am | 1pm |
| 6am | 2pm |
| 7am | 3pm |
| 8am | 4pm |
| 9am | 5pm |
| 10am | 6pm |
| 11am | 7pm |
| 12pm | 8pm |
| 1pm | 9pm |
| 2pm | 10pm |
| 3pm | 11pm |
| 4pm | 12am |
| 5pm | 1am |
| 6pm | 2am |
| 7pm | 3am |
| 8pm | 4am |
| 9pm | 5am |
| 10pm | 6am |
| 11pm | 7am |
Time difference from Seoul (UTC+09:00)
-13 hours
-16 hours
-13 hours
-1 hour
-2 hours
-1 hour
-19 hours
-16 hours
-17 hours
-16 hours