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Time difference between Chicago and London

London is 6 hours ahead of Chicago. When it's 9:00 in Chicago, it's 15:00 in London.

London is 6 hours ahead of Chicago.

On Tuesday, 6 October 2026, 09:00 in Chicago is 15:00 in London. Chicago is UTC−5; London is UTC+1.

The gap through 2026

  1. 1 Jan – 8 MarLondon is 6 hours ahead of Chicago.
  2. 8 Mar – 29 MarLondon is 5 hours ahead of Chicago.
  3. 29 Mar – 25 OctLondon is 6 hours ahead of Chicago.
  4. 25 Oct – 1 NovLondon is 5 hours ahead of Chicago.
  5. 1 Nov – 31 DecLondon is 6 hours ahead of Chicago.
  • Chicago moves its clocks forward on 8 March (UTC−6 → UTC−5).
  • London moves its clocks forward on 29 March (UTC → UTC+1).
  • London moves its clocks back on 25 October (UTC+1 → UTC).
  • Chicago moves its clocks back on 1 November (UTC−5 → UTC−6).

Chicago to London, hour by hour

On Tuesday 6 October.

ChicagoLondon
07:00 Early morning13:00 Working hours
08:00 Early morning14:00 Working hours
09:00 Working hours15:00 Working hours
10:00 Working hours16:00 Working hours
11:00 Working hours17:00 Evening
12:00 Working hours18:00 Evening
13:00 Working hours19:00 Evening
14:00 Working hours20:00 Evening
15:00 Working hours21:00 Evening
16:00 Working hours22:00 Sleeping hours
17:00 Evening23:00 Sleeping hours
18:00 Evening00:00+1 Sleeping hours
19:00 Evening01:00+1 Sleeping hours
20:00 Evening02:00+1 Sleeping hours
21:00 Evening03:00+1 Sleeping hours
22:00 Sleeping hours04:00+1 Sleeping hours

Daylight saving in 2026

  • Chicago moves its clocks forward on Sunday 8 March (UTC−6 → UTC−5).
  • London moves its clocks forward on Sunday 29 March (UTC → UTC+1).
  • London moves its clocks back on Sunday 25 October (UTC+1 → UTC).
  • Chicago moves its clocks back on Sunday 1 November (UTC−5 → UTC−6).
  1. 1 Jan – 8 MarLondon is 6 hours ahead of Chicago.
  2. 8 Mar – 29 MarLondon is 5 hours ahead of Chicago.
  3. 29 Mar – 25 OctLondon is 6 hours ahead of Chicago.
  4. 25 Oct – 1 NovLondon is 5 hours ahead of Chicago.
  5. 1 Nov – 31 DecLondon is 6 hours ahead of Chicago.

Best times for a call

Working hours (09:00–17:00) overlap for 2 hours: 09:00–11:00 in Chicago, which is 15:00–17:00 in London.

  • Chicago 07:00Early morningLondon 13:00Working hours
  • Chicago 09:00Working hoursLondon 15:00Working hours
  • Chicago 10:00Working hoursLondon 16:00Working hours

More time differences for Chicago and London

How the time difference calculator works

The difference is each city's offset from UTC on the date you pick, subtracted. Offsets come from the IANA time zone database in your browser.

Because countries change their clocks on different dates — or not at all — the gap between two cities can change for a few weeks a year. The calculator lists every change in the year.

Examples

  • London is 5 hours ahead of New York for most of the year, but only 4 hours ahead for about three weeks in March and one week in late October.
  • Dubai doesn't change its clocks, so its gap to London is 4 hours in winter and 3 hours in summer.

Good for

  • Knowing when a colleague's day starts
  • Setting expectations for replies across time zones
  • Planning travel and jet lag

Frequently asked questions

What time is it in London when it's 9 AM in Chicago?
3:00 PM — as of 6 October 2026. London is 6 hours ahead of Chicago.
Does the time difference between Chicago and London change?
Yes. In 2026 it's 6 hours or 5 hours, depending on the date, because the two cities change their clocks on different dates.
What's the best time for a call between Chicago and London?
Between 09:00 and 11:00 Chicago time, when both cities are in working hours (09:00–17:00).
What time zones are Chicago and London in?
Chicago uses America/Chicago (UTC−5 today); London uses Europe/London (UTC+1 today).

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