United Kingdom
United States
London to Chicago Time Difference
Chicago is 6 hours behind London
London vs Chicago — At a Glance
London to Chicago — Hour-by-Hour
About London and Chicago
London (population: 8.8M) is known for global finance, the City of London, Buckingham Palace, and the world's oldest underground railway. Chicago (population: 2.7M) is known for commodities trading, deep-dish pizza, architecture, and the Chicago Board of Trade.
Business Hours Overlap
London and Chicago are both global financial centers. When London's market closes, Chicago's is yet to open, creating a relay pattern common in 24-hour trading.
Calling Between Cities
When calling Chicago (+1) from London (+44), be mindful of the 6-hour gap. The safest window is late afternoon in London (4–6 PM) to reach people during waking hours.
Currency
London uses GBP while Chicago uses USD. Check current exchange rates before making payments or transferring funds between the two cities.
Language
London and Chicago share English as a common language, which simplifies business communication.
Use our world clock tool to compare London and Chicago visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between London and Chicago?
Chicago, United States is 6 hours behind London, United Kingdom. London is in the Europe/London timezone (UTC+1) and Chicago is in the America/Chicago timezone (UTC-5).
When it's noon in London, what time is it in Chicago?
When it's 12:00 PM (noon) in London, it's 6:00 AM in Chicago.
What is the best time to call Chicago from London?
The best time to call Chicago from London is during the overlapping business hours. When it's 9 AM in London, it's 3:00 AM in Chicago. Aim for late morning to early afternoon in London for the best chance of reaching someone during working hours.
What currency does Chicago use?
Chicago, United States uses USD. London uses GBP. You will need to check the current exchange rate for transactions between the two.
What language is spoken in Chicago?
The primary language in Chicago is English. London also speaks English, making communication easier.
How do I dial Chicago from London?
To call Chicago from London, dial your international access code followed by +1 and the local number. London uses country code +44 and Chicago uses +1.
