The time difference between San Antonio and London is 5 hours. When it is 12:00 noon in San Antonio, it is 17:00 in London. San Antonio uses the America/Chicago time zone (UTC-5), while London uses Europe/London (UTC+0).
| Detail | San Antonio | London |
|---|---|---|
| Time Zone ID | America/Chicago | Europe/London |
| UTC Offset | UTC-5 | UTC+0 |
| Abbreviation | CDT | GMT |
| DST Active | Yes — currently observing | No |
| Country | United States | United Kingdom |
| Region | North America | Europe |
There are 3 overlapping business hours between San Antonio and London (assuming 9:00–17:00 in each city). The ideal window for calls and meetings is:
Use this table to quickly convert any hour from San Antonio time to London time. Rows highlighted in green indicate overlapping business hours in both cities.
| San Antonio | London | |
|---|---|---|
| 00:00 | 05:00 | Night |
| 01:00 | 06:00 | Night |
| 02:00 | 07:00 | Night |
| 03:00 | 08:00 | Night |
| 04:00 | 09:00 | Night |
| 05:00 | 10:00 | Night |
| 06:00 | 11:00 | |
| 07:00 | 12:00 | |
| 08:00 | 13:00 | |
| 09:00 | 14:00 | Overlap |
| 10:00 | 15:00 | Overlap |
| 11:00 | 16:00 | Overlap |
| 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 (+1 day) | |
| 20:00 | 01:00 (+1 day) | |
| 21:00 | 02:00 (+1 day) | |
| 22:00 | 03:00 (+1 day) | Night |
| 23:00 | 04:00 (+1 day) | Night |
San Antonio is currently observing daylight saving time, while London is on standard time. When San Antonio switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 5 hours. London is 5 hours ahead of San Antonio.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
The best window is between 09:00 and 12:00 San Antonio time, which corresponds to 14:00–17:00 in London. Both sides fall within normal business hours.
Add 5 hours to San Antonio time to get London time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.