Time Difference

Chicago vs London Time Difference

Compare the current local time in Chicago, United States and London, United Kingdom.

Live local timeDST awareUTC offsets

From

Chicago

United States

1:25 AM

Sun, Nov 1

UTC-6America/Chicago

Difference

6 hours

Swap

London

United Kingdom

7:25 AM

Sun, Nov 1

UTC+0Europe/London

Current difference

London is currently 6 hours ahead of Chicago.

This difference is calculated using the current UTC offsets for both locations and automatically reflects daylight-saving changes.

24-hour comparison

Compare Chicago and London hour by hour

See how a full local day in Chicago, United States maps to London, United Kingdom. TimeInOne automatically accounts for timezone offsets, date changes and daylight-saving transitions.

25-hour DST day

Best working-hours overlap

9:00 AM – 12:00 PM in Chicago

corresponds to 3:00 PM – 6:00 PM in London.

3 hours overlap

Chicago

America/Chicago

London

Europe/London

Availability

12:00 AM

Sun, Nov 1

5:00 AM

Sun, Nov 1

Night

1:00 AM

Sun, Nov 1

6:00 AM

Sun, Nov 1

Night

1:00 AM

Sun, Nov 1

7:00 AM

Sun, Nov 1

Night

2:00 AM

Sun, Nov 1

8:00 AM

Sun, Nov 1

Night

3:00 AM

Sun, Nov 1

9:00 AM

Sun, Nov 1

Night

4:00 AM

Sun, Nov 1

10:00 AM

Sun, Nov 1

Night

5:00 AM

Sun, Nov 1

11:00 AM

Sun, Nov 1

Night

6:00 AM

Sun, Nov 1

12:00 PM

Sun, Nov 1

Night

7:00 AM

Sun, Nov 1

1:00 PM

Sun, Nov 1

Possible

8:00 AM

Sun, Nov 1

2:00 PM

Sun, Nov 1

Possible

9:00 AM

Sun, Nov 1

3:00 PM

Sun, Nov 1

Good overlap

10:00 AM

Sun, Nov 1

4:00 PM

Sun, Nov 1

Good overlap

11:00 AM

Sun, Nov 1

5:00 PM

Sun, Nov 1

Good overlap

12:00 PM

Sun, Nov 1

6:00 PM

Sun, Nov 1

Possible

1:00 PM

Sun, Nov 1

7:00 PM

Sun, Nov 1

Possible

2:00 PM

Sun, Nov 1

8:00 PM

Sun, Nov 1

Possible

3:00 PM

Sun, Nov 1

9:00 PM

Sun, Nov 1

Night

4:00 PM

Sun, Nov 1

10:00 PM

Sun, Nov 1

Night

5:00 PM

Sun, Nov 1

11:00 PM

Sun, Nov 1

Night

6:00 PM

Sun, Nov 1

12:00 AM

Next day

Mon, Nov 2

Night

7:00 PM

Sun, Nov 1

1:00 AM

Next day

Mon, Nov 2

Night

8:00 PM

Sun, Nov 1

2:00 AM

Next day

Mon, Nov 2

Night

9:00 PM

Sun, Nov 1

3:00 AM

Next day

Mon, Nov 2

Night

10:00 PM

Sun, Nov 1

4:00 AM

Next day

Mon, Nov 2

Night

11:00 PM

Sun, Nov 1

5:00 AM

Next day

Mon, Nov 2

Night

Working-hour labels use a general 9:00 AM–6:00 PM schedule. Individual schedules may differ.

On daylight-saving transition dates, a local day can contain 23 or 25 real hours instead of 24.

Call planning

Best time to call London from Chicago

Compare typical business hours in Chicago, United States and London, United Kingdom to find a practical time for calls, meetings or international coordination.

Chicago

9:00 AM – 12:00 PM

United States

Best overlap

London

3:00 PM – 6:00 PM

United Kingdom

The best time to call London from Chicago is between 9:00 AM and 12:00 PM in Chicago. This corresponds to 3:00 PM – 6:00 PM in London.

Other reasonable windows

Chicago

7:00 AM – 9:00 AM

London

1:00 PM – 3:00 PM

Chicago

12:00 PM – 3:00 PM

London

6:00 PM – 9:00 PM

Recommendations use typical 9:00 AM–6:00 PM business hours and a broader 7:00 AM–9:00 PM acceptable calling window. Individual schedules may differ.

Time difference explained

Chicago and London time difference explained

Current local-time relationship

London is currently 6 hours ahead of Chicago.

Chicago uses America/Chicago and currently has an offset of UTC-6. London uses Europe/London and currently has an offset of UTC+0.

Working-hours overlap

For a typical 9:00 AM–6:00 PM workday, the cities overlap from 9:00 AM to 12:00 PM in Chicago, corresponding to 3:00 PM–6:00 PM in London.

Because UTC offsets can change during the year, always check the selected date when planning an important international call or meeting.

Convert a specific time

Need more than the current difference?

Convert a specific date and local time between Chicago and London.

Open time converter

Local clocks

Explore each city

Current time in Chicago Current time in London

FAQ

Chicago to London time difference FAQ

Common questions about the current time difference, UTC offsets, daylight-saving changes and practical calling hours between Chicago and London.

What is the time difference between Chicago and London?

The current time difference between Chicago and London is 6 hours. London is currently 6 hours ahead of Chicago.

Is London ahead of or behind Chicago?

London is currently 6 hours ahead of Chicago.

What time is it in London when it is 9:00 AM in Chicago?

Using the current UTC offsets, 9:00 AM in Chicago corresponds to 3:00 PM in London. The exact difference can change when daylight-saving rules change.

What is the best time to call London from Chicago?

Typical 9:00 AM–6:00 PM business hours overlap between 9:00 AM and 12:00 PM in Chicago. This corresponds to 3:00 PM–6:00 PM in London.

Can the time difference between Chicago and London change?

Yes. The time difference can change if Chicago or London changes its UTC offset because of daylight-saving or other local time-zone rules. TimeInOne uses the IANA zones America/Chicago and Europe/London for date-aware calculations.