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Global ClockTime zone converter & meeting planner
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Working hours
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09
End
18
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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Chicago vs London

Chicago keeps CDT (UTC−5) and London keeps BST (UTC+1) today. London is 6 hours ahead of Chicago; the rows below read both clocks live.

The working day, side by side

Hours shaded in both rows are inside working hours in both cities: 15:00–18:00 in London (09:00–12:00 your time).

Chicago and London hour by hour, with the working-hour overlap shaded
City00:00 in Chicago01:00 in Chicago02:00 in Chicago03:00 in Chicago04:00 in Chicago05:00 in Chicago06:00 in Chicago07:00 in Chicago08:00 in Chicago09:00 in Chicago10:00 in Chicago11:00 in Chicago12:00 in Chicago13:00 in Chicago14:00 in Chicago15:00 in Chicago16:00 in Chicago17:00 in Chicago18:00 in Chicago19:00 in Chicago20:00 in Chicago21:00 in Chicago22:00 in Chicago23:00 in Chicago
Chicago——000102030405060708091011121314151617181920212223
London——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Chicago and London

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Chicago, London and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

09:00 in Chicago
Inside working hours on both sides
15:00 in London
10:00 in Chicago
Inside working hours on both sides
16:00 in London
11:00 in Chicago
Inside working hours on both sides
17:00 in London

Where daylight saving pulls them apart

Chicago next changes on Sunday 1 November 2026. London next changes on Sunday 25 October 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.

Also useful

Common questions

How many hours ahead is London of Chicago?

London is 6 hours ahead of Chicago right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Chicago and London?

Any hour in 09:00–12:00 Chicago time is inside working hours in both cities.

Do Chicago and London change clocks on the same date?

No. Chicago changes on 1 November 2026 and London on 25 October 2026, so the gap moves by an hour in between.