Chicago vs London
London is 6 hours ahead Chicago
Chicago
London
The DST gap
When daylight saving changes don't line up, the gap between Chicago and London shifts.
Right now the gap is its usual 6h: London is 6 hours ahead of Chicago.
Next change in 3 days (Oct 25, 2026): London clocks go back 1 hour, and the gap goes from 6h to 5h.
2026 · usually 6h
The dark line is today.
Mar 8 – Mar 29: 5h instead of 6h · 21 days · past
Starts when Chicago clocks go forward 1 hour; ends when London clocks go forward 1 hour.
Oct 25 – Nov 1: 5h instead of 6h · 7 days
Starts when London clocks go back 1 hour; ends when Chicago clocks go back 1 hour.
Computed from the IANA time zone database; no dates are typed in by hand. See which popular city pairs are drifting right now
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Best times to call between Chicago and London
Current scheduled offset: 6 hours ahead. DST rules are automatically applied.