Chicago to London — Time Difference
Live clocks · Full 24-hour table · United States → United Kingdom
Time Difference: Chicago vs London
London is 6 hours ahead of Chicago. Chicago is in Central Daylight Time (CDT, UTC-5) and London is in British Summer Time (GMT+1, UTC+1).
Use the table below to find the equivalent London time for any hour in Chicago. Click any row to see the full conversion page for that hour.
Business Hours — Chicago to London
"Good" = both cities within business hours (9 AM–5 PM)
Full 24-Hour Table — Chicago to London
Frequently Asked Questions
What is the time difference between Chicago and London?
London is 6 hours ahead of Chicago. Chicago uses Central Daylight Time (CDT, UTC-5) and London uses British Summer Time (GMT+1, UTC+1).
What time is it in London when it is 9 AM in Chicago?
9 AM in Chicago (CDT) equals 3 PM in London (GMT+1).
Is Chicago ahead or behind London?
London is 6 hours ahead of Chicago.
What is the best time to call from Chicago to London?
The best time to call from Chicago to London is between 9 AM–11 AM Chicago time, when London is also within normal working hours (9 AM–5 PM).
Time Zones
Chicago
Central Daylight Time
CDT · UTC-5
London
British Summer Time
GMT+1 · UTC+1
Reverse Conversion
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