London to Chicago Time Converter

Key facts

• London is on GMT (UTC+0) until 28 March 2027, on standard time.
• Chicago is on CDT (UTC-5) until 1 November 2026, observing daylight saving time.
• Time difference: 5 hours (Chicago is behind London) until 1 November 2026.
• Range over the next 12 months: 5–6 hours.

How do I convert London time to Chicago time?

When it is 9:00 AM in London, it is 4:00 AM the same day in Chicago. The table below converts every hour of the day.

What is the best time to call Chicago from London?

The best time to call is 2:00 PM to 5:00 PM in London, which is 9:00 AM to 12:00 PM in Chicago. Both cities are inside 9:00 AM to 5:00 PM then. This applies on 31 October 2026.

Does the London to Chicago time difference change with daylight saving time?

Yes. Over the next 12 months the London to Chicago gap is 5–6 hours, because both cities change their clocks, on different dates.

London changes its clocks on 28 March 2027 (forward 1 hour) and 31 October 2027 (back 1 hour).

Chicago changes its clocks on 1 November 2026 (back 1 hour) and 14 March 2027 (forward 1 hour).

Over the next 12 months the difference is 5–6 hours:

• 31 October 2026 until 1 November 2026: Chicago is 5 hours behind London.
• 1 November 2026 until 14 March 2027: Chicago is 6 hours behind London.
• 14 March 2027 until 28 March 2027: Chicago is 5 hours behind London.
• 28 March 2027 until 31 October 2027: Chicago is 6 hours behind London.

What are common London to Chicago times?

9:00 AM in London is 4:00 AM in Chicago. 5:00 PM in London is 12:00 PM in Chicago. The tables below list nine everyday times from 6:00 AM to 10:00 PM in both directions.

What are common Chicago to London times?

These times apply on 31 October 2026. The gap changes with daylight saving time.

Which time zones do London and Chicago use?

London, United Kingdom, uses the Europe/London time zone, GMT (UTC+0) until 28 March 2027. Chicago, United States of America, uses the America/Chicago time zone, CDT (UTC-5) until 1 November 2026.

Both are named IANA time zones, so London and Chicago follow their own daylight saving rules for the date you choose instead of a fixed offset. That is why the gap between them can change by an hour at different times of the year.

People often search for UK time to US Central time. On this page UK time means London time and US Central time means Chicago time. The United States spans several time zones and Chicago is on Central time.

Frequently Asked Questions

What is the time difference between London and Chicago?

Chicago is 5 hours behind London until 1 November 2026. Across the next 12 months the gap is 5–6 hours because of daylight saving time.

How many hours is Chicago behind London?

Chicago is 5 hours behind London until 1 November 2026. Put the other way, London is 5 hours ahead of Chicago, so subtract that gap from London time to get Chicago time.

What is 8 PM Chicago time in London?

8:00 PM in Chicago is 1:00 AM the next day in London. This applies on 31 October 2026. The gap changes with daylight saving time, so check the date you need in the converter.

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

When it is 9:00 AM in London, it is 4:00 AM the same day in Chicago. This applies on 31 October 2026. The gap changes with daylight saving time, so check the date you need in the converter.

What is the best time to call Chicago from London?

The best time to call is 2:00 PM to 5:00 PM in London, which is 9:00 AM to 12:00 PM in Chicago. Both cities are inside 9:00 AM to 5:00 PM then. This applies on 31 October 2026.

What is the time difference between UK time and US Central time?

Chicago is 5 hours behind London until 1 November 2026. Here UK time means London time and US Central time means Chicago time.

Does the London–Chicago time difference change with daylight saving time?

Yes. Across the next 12 months the gap is 5–6 hours because of daylight saving time. From 1 November 2026 the difference becomes 6 hours, when Chicago ends daylight saving time. From 14 March 2027 the difference becomes 5 hours, when Chicago starts daylight saving time. From 28 March 2027 the difference becomes 6 hours, when London starts daylight saving time.

Can I convert a future date between London and Chicago?

Yes. Pick any date in the converter above and it applies the offsets London and Chicago will use on that day, including daylight saving time changes.

Related time zone conversions

• Chicago to London time
• London to New York time
• London to Sydney time
• London to Auckland time
• London to Dubai time
• London to Mumbai time
• London to Paris time
• London to Berlin time
• London to Toronto time
• London to Singapore time
• London to Los Angeles time
• London to Tokyo time
• Current time in London
• Current time in Chicago
• Time zone converter
• World clock

Offsets checked against IANA time zone data on 31 October 2026.

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