United States
United Kingdom
Chicago to London Time Difference
London is 6 hours ahead of Chicago
Chicago vs London — At a Glance
Chicago to London — Hour-by-Hour
About Chicago and London
Chicago (population: 2.7M) is known for commodities trading, deep-dish pizza, architecture, and the Chicago Board of Trade. London (population: 8.8M) is known for global finance, the City of London, Buckingham Palace, and the world's oldest underground railway.
Business Hours Overlap
Chicago and London are both global financial centers. When Chicago's market closes, London's is already open, creating a relay pattern common in 24-hour trading.
Calling Between Cities
When calling London (+44) from Chicago (+1), be mindful of the 6-hour gap. The safest window is early morning in Chicago (8–10 AM) to reach people during waking hours.
Currency
Chicago uses USD while London uses GBP. Check current exchange rates before making payments or transferring funds between the two cities.
Language
Chicago and London share English as a common language, which simplifies business communication.
Use our world clock tool to compare Chicago and London visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between Chicago and London?
London, United Kingdom is 6 hours ahead of Chicago, United States. Chicago is in the America/Chicago timezone (UTC-5) and London is in the Europe/London timezone (UTC+1).
When it's noon in Chicago, what time is it in London?
When it's 12:00 PM (noon) in Chicago, it's 6:00 PM in London.
What is the best time to call London from Chicago?
The best time to call London from Chicago is during the overlapping business hours. When it's 9 AM in Chicago, it's 3:00 PM in London. Aim for late morning to early afternoon in Chicago for the best chance of reaching someone during working hours.
What currency does London use?
London, United Kingdom uses GBP. Chicago uses USD. You will need to check the current exchange rate for transactions between the two.
What language is spoken in London?
The primary language in London is English. Chicago also speaks English, making communication easier.
How do I dial London from Chicago?
To call London from Chicago, dial your international access code followed by +44 and the local number. Chicago uses country code +1 and London uses +44.
