TimeThereChicago to London time difference
London is 6h ahead Chicago (as of 2026-09-30).
Both cities use daylight saving time, but they switch on different dates. The gap changes for a few weeks each spring and fall.
Every gap change in 2026 and 2027
Gap means how far London is from Chicago. Times are local at the moment the new gap starts.
2026
| Chicago time | London time | Gap |
|---|---|---|
| Sun, Mar 8, 03:00 | Sun, Mar 8, 08:00 | 6h ahead to 5h ahead (shrinks) |
| Sat, Mar 28, 20:00 | Sun, Mar 29, 02:00 | 5h ahead to 6h ahead (grows) |
| Sat, Oct 24, 20:00 | Sun, Oct 25, 01:00 | 6h ahead to 5h ahead (shrinks) |
| Sun, Nov 1, 01:00 | Sun, Nov 1, 07:00 | 5h ahead to 6h ahead (grows) |
2027
| Chicago time | London time | Gap |
|---|---|---|
| Sun, Mar 14, 03:00 | Sun, Mar 14, 08:00 | 6h ahead to 5h ahead (shrinks) |
| Sat, Mar 27, 20:00 | Sun, Mar 28, 02:00 | 5h ahead to 6h ahead (grows) |
| Sat, Oct 30, 20:00 | Sun, Oct 31, 01:00 | 6h ahead to 5h ahead (shrinks) |
| Sun, Nov 7, 01:00 | Sun, Nov 7, 07:00 | 5h ahead to 6h ahead (grows) |
Business hours overlap
- 6h ahead: Working days of 9:00 to 18:00: 3h shared (Chicago 09:00 to 12:00 is London 15:00 to 18:00). Working days of 8:00 to 20:00: 6h shared (Chicago 08:00 to 14:00 is London 14:00 to 20:00).
- 5h ahead: Working days of 9:00 to 18:00: 4h shared (Chicago 09:00 to 13:00 is London 14:00 to 18:00). Working days of 8:00 to 20:00: 7h shared (Chicago 08:00 to 15:00 is London 13:00 to 20:00).
FAQ
What is the time difference between Chicago and London?
London is 6h ahead from Jan 1, 2026, then 5h ahead from Mar 8, 2026, then 6h ahead from Mar 28, 2026, then 5h ahead from Oct 24, 2026, then 6h ahead from Nov 1, 2026, then 5h ahead from Mar 14, 2027, then 6h ahead from Mar 27, 2027, then 5h ahead from Oct 30, 2027, then 6h ahead from Nov 7, 2027. The exact number depends on daylight saving time.
When does the time difference between Chicago and London change?
It changes on Mar 8, 2026, Mar 28, 2026, Oct 24, 2026, Nov 1, 2026, Mar 14, 2027, Mar 27, 2027, Oct 30, 2027, Nov 7, 2027 (dates in Chicago time).
What are good meeting times for Chicago and London?
Working days of 9:00 to 18:00: 3h shared (Chicago 09:00 to 12:00 is London 15:00 to 18:00). Working days of 8:00 to 20:00: 6h shared (Chicago 08:00 to 14:00 is London 14:00 to 20:00). Check the table above because the gap moves on the dates listed.
Related pairs
- Seoul to London
- Tokyo to London
- Bangalore to London
- Mumbai to London
- Singapore to London
- Manila to London
- Shanghai to London
- Taipei to London
Data comes from the IANA time zone database as built into Node.js. Later rule changes by governments can move these dates.
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