Time difference between London and Chicago today
At this moment Chicago is 6 hours behind of London. When it is 09:00 in London, it is 03:00 in Chicago. London is on British Summer Time (BST); Chicago is on Central Daylight Time (CDT).
When the London to Chicago time difference changes
For most of the year Chicago is 6 hours behind of London. From 25 October to 31 October 2026, Chicago is 5 hours behind of London instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
| Dates | Chicago vs London | Length |
|---|---|---|
| 29 March 2026 to 24 October 2026 | 6 hours behind | 210 days |
| 25 October 2026 to 31 October 2026 | 5 hours behind | 7 days |
| 1 November 2026 to 31 December 2026 | 6 hours behind | 61 days |
| 1 January 2027 to 13 March 2027 | 6 hours behind | 72 days |
| 14 March 2027 to 27 March 2027 | 5 hours behind | 14 days |
| 28 March 2027 to 30 October 2027 | 6 hours behind | 217 days |
| 31 October 2027 to 6 November 2027 | 5 hours behind | 7 days |
| 7 November 2027 to 31 December 2027 | 6 hours behind | 55 days |
Best time for a meeting between London and Chicago
- When Chicago is 6 hours behind of London: 2 shared office hours, 15:00 to 17:00 in London (09:00 to 11:00 in Chicago).
- When Chicago is 5 hours behind of London: 3 shared office hours, 14:00 to 17:00 in London (09:00 to 12:00 in Chicago).