London ChicagoTime Converter
London (BST, UTC+1) is currently 6 hours ahead of Chicago (CDT, UTC−5). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in London, it's the same day in Chicago.
London (GMT/BST) runs 6 hours ahead of Chicago (CST/CDT). Both sides keep standard office hours with a real 9–6 overlap — the highlighted window below works for everyone.
- Time difference
- −6h 00m
- London
- UTC+1
- Chicago
- UTC−5
- Best call window
- 3:00 PM BST
London to Chicago conversion table
The next 12 hours in London and the matching local time in Chicago. The current hour is highlighted; drag the converter's slider and the table follows.
| London · BST | Chicago · CDT |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Best time to meet between London & Chicago
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between London and Chicago swings between 6 and 5 hours across the year as each side starts or ends daylight saving. Clocks in London move back 1 hour to GMT (UTC±0) on Sunday, October 25, 2026. Clocks in Chicago move back 1 hour to CST (UTC−6) on Sunday, November 1, 2026. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair — every combination is a live tool, not an article.
From London
To Chicago
One source of truth — for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am London time in Chicago?", it can cite the exact, DST-aware result — not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "London → Chicago",
"url": "https://worldclock.pro/en/convert/london-to-chicago",
"from": {
"name": "London",
"type": "city",
"abbreviation": "GMT",
"daylightAbbreviation": "BST",
"iana": "Europe/London",
"standardUtcOffset": "+00:00",
"daylightUtcOffset": "+01:00",
"referenceCity": "London"
},
"to": {
"name": "Chicago",
"type": "city",
"abbreviation": "CST",
"daylightAbbreviation": "CDT",
"iana": "America/Chicago",
"standardUtcOffset": "-06:00",
"daylightUtcOffset": "-05:00",
"referenceCity": "Chicago"
},
"currentDifferenceMinutes": -360,
"possibleDifferencesMinutes": [
-360,
-300
],
"note": "Between the regions that use these zones the difference is 6 and 5 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between London and Chicago?
London is currently 6 hours ahead of Chicago. London is on BST (UTC+1) and Chicago is on CDT (UTC−5). The difference can change when either side starts or ends daylight saving time.
Is Chicago ahead of or behind London?
Chicago is currently 6 hours behind London.
When it is 9:00 AM in London, what time is it in Chicago?
When it is 9:00 AM on a Monday in London, it is 3:00 AM in Chicago.
Do London and Chicago observe daylight saving time?
Clocks in London move back 1 hour to GMT (UTC±0) on Sunday, October 25, 2026. Clocks in Chicago move back 1 hour to CST (UTC−6) on Sunday, November 1, 2026.
How do I convert London time to Chicago time?
Subtract 6 hours from any time in London to get the time in Chicago. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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