Chicago ↔ London Meeting Guide
Best Meeting Time Between Chicago and London
Chicago and London share a real but narrow working-hours overlap: most of the year, only the first two hours of the Chicago working day line up with London's afternoon. For a few weeks each spring and autumn, a daylight-saving mismatch temporarily widens that window by an hour.
The short answer
Most of the year, London is 6 hours ahead of Chicago. With MeetingTrip's configured 9:00 AM–5:00 PM working hours for both cities, that leaves a two-hour shared working window:
- Chicago: 9:00 AM–11:00 AM
- London: 3:00 PM–5:00 PM
The simplest starting point is 9:00 AM Chicago / 3:00 PM London. During the short daylight-saving mismatch periods each spring and autumn, London is temporarily only 5 hours ahead, and the shared window widens to three hours: Chicago 9:00 AM–12:00 PM, London 2:00 PM–5:00 PM.
These figures assume a 9:00 AM–5:00 PM working day in each city — not every office keeps those hours. The International Meeting Planner calculates the result for your actual date and working hours.
Normal period
Best meeting times between Chicago and London
Working hours: Chicago 9:00 AM–5:00 PM, London 9:00 AM–5:00 PM. 30-minute meeting duration.
The first two options land both participants inside their normal working day at the moment the meeting starts. The third is scored lower — by noon in Chicago, London's working day has already ended.
A score of 100 describes the meeting's start time, not its full length. A 30-minute meeting at 10:30 AM Chicago ends exactly at 5:00 PM in London. For a 60-minute meeting that should finish by 5:00 PM London, the latest practical start is about 10:00 AM Chicago / 4:00 PM London most of the year.
The overlap, visually
Working-hours overlap between Chicago and London
Both cities use the same 9:00 AM–5:00 PM working day by default. With a 6-hour gap, only the start of Chicago's day meets the end of London's:
| City | Working day | Shared with the other city |
|---|---|---|
| Chicago | 9:00 AM–5:00 PM | 9:00 AM–11:00 AM |
| London | 9:00 AM–5:00 PM | 3:00 PM–5:00 PM |
Chicago's 9:00 AM–11:00 AM is the exact same two hours as London's 3:00 PM–5:00 PM — just described from each city's own clock.
Why Chicago is different
Why Chicago–London is tighter than New York–London
Chicago sits one hour further west than New York, and that single hour costs a third of the shared window. New York and London normally share three working hours; Chicago and London share two.
The shape of the day matters too. London's entire working morning happens before Chicago's working day begins — 9:00 AM in London is 3:00 AM in Chicago, and London's noon is only 6:00 AM — so London's morning is effectively unusable for a shared meeting. The whole overlap is compressed into Chicago's first two working hours, which means there's little room for a late-morning Chicago slot, and a Chicago team that starts its day with internal meetings can easily use up the only window London has.
In practice, Chicago–London meetings work best when they're treated as a fixed early-morning commitment on the Chicago side, protected in the calendar rather than squeezed in wherever there's space.
Quick reference
Chicago and London time conversions
The "Normal period" column applies most of the year, when London is 6 hours ahead. The "DST mismatch" column applies only during the short spring and autumn weeks when London is 5 hours ahead.
| Chicago time | London — normal period (6 h ahead) | London — DST mismatch (5 h ahead) |
|---|---|---|
| 8:00 AM | 2:00 PM | 1:00 PM |
| 9:00 AM | 3:00 PM | 2:00 PM |
| 10:00 AM | 4:00 PM | 3:00 PM |
| 11:00 AM | 5:00 PM | 4:00 PM |
| 12:00 PM | 6:00 PM | 5:00 PM |
| London time | Chicago — normal period (6 h behind) | Chicago — DST mismatch (5 h behind) |
|---|---|---|
| 9:00 AM | 3:00 AM | 4:00 AM |
| 12:00 PM | 6:00 AM | 7:00 AM |
| 2:00 PM | 8:00 AM | 9:00 AM |
| 5:00 PM | 11:00 AM | 12:00 PM |
Need a time that isn't listed, or a specific date? The International Meeting Planner converts it for the actual day, including daylight saving time.
Daylight saving time
Why the Chicago–London meeting window changes
Chicago uses the America/Chicago time zone and London uses Europe/London. Both observe daylight saving time, but they don't change their clocks on the same dates.
In spring, the US moves its clocks forward first. Until the UK follows, London is only 5 hours ahead of Chicago instead of 6 — a mismatch that lasts roughly two to three weeks, depending on the year. In autumn the order reverses: the UK moves its clocks back first, and the US follows about a week later, giving another short period at 5 hours.
For this pair, the mismatch helps. The working-hours overlap grows from two hours to three, so the Chicago late morning briefly becomes usable for London.
For example, in 2026 Chicago and London are temporarily five hours apart from March 8 through March 28 and from October 25 through October 31. The exact dates shift every year — the pattern, not the specific dates, is what stays true.
Side by side
Normal period vs. DST-mismatch period
| Period | Time difference | Working-hours overlap | Shared window |
|---|---|---|---|
| Normal period | 6 hours | 2 hours | Chicago 9:00 AM–11:00 AM / London 3:00 PM–5:00 PM |
| DST mismatch | 5 hours | 3 hours | Chicago 9:00 AM–12:00 PM / London 2:00 PM–5:00 PM |
DST-mismatch period
How the recommendations change during a mismatch period
Same cities, same 9:00 AM–5:00 PM working hours, same 30-minute duration — only the date changes. The Chicago start times look the same as in the normal period, but every London time moves one hour earlier.
The real change is the extra hour in the middle. During mismatch weeks, starts at roughly 11:00–11:30 AM Chicago (4:00–4:30 PM London) also fall inside both working days, which they don't the rest of the year. The International Meeting Planner spaces its suggestions at least 90 minutes apart so they're genuinely distinct, so these starts may not appear as separate recommendations — but they're fully comfortable options during these weeks. For a 60-minute meeting ending by 5:00 PM London, the latest practical start becomes about 11:00 AM Chicago.
Putting it into practice
Scheduling recurring Chicago–London meetings fairly
With only two comfortable hours most of the year, recurring Chicago–London meetings often end up at an edge of someone's day. The two most common compromises are an early start in Chicago — 8:00 AM Chicago / 2:00 PM London — or a late finish in London — around 12:00 PM Chicago / 6:00 PM London. Neither is unreasonable, but always giving the same team the inconvenient slot adds up over time. Where it fits your team, rotating who takes the early or late meeting spreads that cost more evenly.
It's also worth rechecking recurring meetings around the daylight-saving changes each spring and autumn. A time set during a mismatch week — 11:00 AM Chicago, for example — lands right at the end of London's working day (5:00 PM) once the normal 6-hour gap returns. MeetingTrip doesn't track recurring meetings or adjust them automatically; the International Meeting Planner recalculates fresh whenever you check a new date.
Common questions
Frequently asked questions
What is the best meeting time between Chicago and London?
Most of the year, 9:00 AM in Chicago (3:00 PM in London) is the simplest starting point. With MeetingTrip's configured 9:00 AM–5:00 PM working hours, the two cities share a two-hour window, from 9:00 to 11:00 AM in Chicago, which is 3:00 to 5:00 PM in London. During the short daylight-saving mismatch weeks each spring and autumn, that window temporarily widens to three hours.
How many working hours overlap between Chicago and London?
Normally two hours: 9:00 to 11:00 AM in Chicago, which is 3:00 to 5:00 PM in London, assuming a 9:00 AM–5:00 PM working day in each city. For a few weeks each spring and autumn, when the US and UK are on different daylight-saving schedules, the overlap widens to three hours: 9:00 AM to 12:00 PM in Chicago, or 2:00 to 5:00 PM in London.
What time is 9 AM in Chicago in London?
Normally 3:00 PM in London, because London is usually 6 hours ahead of Chicago. During the daylight-saving mismatch weeks in spring and autumn, it's 2:00 PM in London instead, since the gap temporarily narrows to 5 hours.
What time is 9 AM in London in Chicago?
Normally 3:00 AM in Chicago, and 4:00 AM during the daylight-saving mismatch weeks. That's why a London-morning meeting rarely works for a Chicago team — the practical shared window sits in London's afternoon.
Does daylight saving time change the Chicago–London time difference?
Yes, for a few weeks each year. Chicago and London change their clocks on different dates. In spring the US moves its clocks first, and the gap is 5 hours for roughly two to three weeks until the UK follows. In autumn the UK changes first, and the US follows about a week later. The rest of the year, London is 6 hours ahead of Chicago.
How can Chicago and London teams schedule recurring meetings fairly?
Because the comfortable window is only two hours most of the year, meetings that don't fit inside it tend to land at an edge: an early start in Chicago (8:00 AM Chicago / 2:00 PM London) or a late finish in London (around 12:00 PM Chicago / 6:00 PM London). Rotating which side takes the less convenient slot avoids always asking the same team to stretch its day. It's also worth rechecking recurring meetings around daylight-saving changes — MeetingTrip doesn't track recurring meetings automatically.
Related resources
Looking for the current local time or the raw time difference instead of a meeting recommendation? See Time Difference in Chicago or Time Difference in London. Working from the US East Coast instead? The New York–London meeting guide shows how one hour further east adds an extra shared hour, while the Los Angeles–London meeting guide covers a corridor with no normal overlap at all. For the wider regional picture, see Best Meeting Times Between the US and Europe.
Ready to schedule your meeting?
These examples use representative dates. Enter your real meeting date in the International Meeting Planner to get a recommendation calculated specifically for it.