Time difference between Chicago and London
London is currently 6 hours ahead of Chicago. The best shared working window is 14:00–16:00 UTC, 2 hours of it. The table below shows the hours side by side.
National conventions are the default and the public figure. Change them here for your own answer — the chart, the window and the calendar file all follow.
09:00 Chicago At work = 15:00 London At work
Tap any hour to read it in both cities.
Hour by hour
| Chicago | London | |
|---|---|---|
| 00:00 | 06:00 | |
| 01:00 | 07:00 | |
| 02:00 | 08:00 | |
| 03:00 | 09:00 | |
| 04:00 | 10:00 | |
| 05:00 | 11:00 | |
| 06:00 | 12:00 | |
| 07:00 | 13:00 | |
| 08:00 | 14:00 | |
| 09:00 | 15:00 | both at work |
| 10:00 | 16:00 | both at work |
| 11:00 | 17:00 | |
| 12:00 | 18:00 | |
| 13:00 | 19:00 | |
| 14:00 | 20:00 | |
| 15:00 | 21:00 | |
| 16:00 | 22:00 | |
| 17:00 | 23:00 | |
| 18:00 | 00:00 | |
| 19:00 | 01:00 | |
| 20:00 | 02:00 | |
| 21:00 | 03:00 | |
| 22:00 | 04:00 | |
| 23:00 | 05:00 |
The difference adjusts automatically for daylight saving in both Chicago and London.
The working week
- Chicago
- 09:00 to 17:00, Monday, Tuesday, Wednesday, Thursday, Friday.
- London
- 09:00 to 17:00, Monday, Tuesday, Wednesday, Thursday, Friday.
Sources and last check
Times, offsets and sun positions on this page are computed live from the IANA timezone database and the NOAA solar algorithm, so they do not depend on the review dates below.
- Working hours and weekend days for 55 countries
- Source: Published national labour conventions and government working-hours guidance. Last checked, reviewed every 12 months.
Not covered:A national convention, not any given employer. Countries not listed fall back to a nine-to-five, Monday to Friday default, and pages say so rather than implying we checked.
FAQ
How many hours between Chicago and London?
London is 6 hours ahead of Chicago (+6 hours).
When is the best time for a meeting?
Around 14:00–16:00 UTC, when both working days overlap — Chicago works 09:00–17:00 and London works 09:00–17:00, each in their own local time.