Live Synchronized Time Difference
LondontoChicagoTime Difference
🇬🇧
London
United Kingdom (GMT)15:10:17UTC+0:00
🇺🇸
Chicago
United States (CDT)10:10:17UTC-5:00
Direct Distance6,353 km (3,948 miles)
Estimated Flight Time~8 hours
Business Overlap3 overlapping hours (9am–5pm)
Mutual Working Window: 3 Overlapping Hours
Recommended calling window between London and Chicago
Active Calling Window Now
London Time
2:00 PM – 5:00 PM
Chicago Time
9:00 AM – 12:00 PM
Both locations share 3 overlapping standard business hours (9:00 AM – 5:00 PM). This is the premier window for real-time video conferences, corporate calls, and instant collaboration without outside-hours disruption.
24-Hour Schedule Conversion Matrix
Compare every hour of the day between London and Chicago.
Work (9am-5pm)ShoulderSleep / Off
| London Time (United Kingdom) | Chicago Time (United States) | Status & Recommendation |
|---|---|---|
| 00:00AM | 19:00PM-1 day | ⚪ Outside Work Hours |
| 01:00AM | 20:00PM-1 day | ⚪ Outside Work Hours |
| 02:00AM | 21:00PM-1 day | ⚪ Outside Work Hours |
| 03:00AM | 22:00PM-1 day | ⚪ Outside Work Hours |
| 04:00AM | 23:00PM-1 day | ⚪ Outside Work Hours |
| 05:00AM | 00:00AM | ⚪ Outside Work Hours |
| 06:00AM | 01:00AM | ⚪ Outside Work Hours |
| 07:00AM | 02:00AM | ⚪ Outside Work Hours |
| 08:00AM | 03:00AM | ⚪ Outside Work Hours |
| 09:00AM | 04:00AM | ⚪ Outside Work Hours |
| 10:00AM | 05:00AM | ⚪ Outside Work Hours |
| 11:00AM | 06:00AM | ⚪ Outside Work Hours |
| 12:00PM | 07:00AM | 🟡 Feasible (Shoulder Hour) |
| 13:00PM | 08:00AM | 🟡 Feasible (Shoulder Hour) |
| 14:00PM | 09:00AM | 🟢 Ideal Meeting Window |
| 15:00PM | 10:00AM | 🟢 Ideal Meeting Window |
| 16:00PM | 11:00AM | 🟢 Ideal Meeting Window |
| 17:00PM | 12:00PM | ⚪ Outside Work Hours |
| 18:00PM | 13:00PM | ⚪ Outside Work Hours |
| 19:00PM | 14:00PM | ⚪ Outside Work Hours |
| 20:00PM | 15:00PM | ⚪ Outside Work Hours |
| 21:00PM | 16:00PM | ⚪ Outside Work Hours |
| 22:00PM | 17:00PM | ⚪ Outside Work Hours |
| 23:00PM | 18:00PM | ⚪ Outside Work Hours |
Frequently Asked Questions
What is the time difference between London and Chicago?
Chicago is 5 hours behind London.
What is the best time to schedule a cross-border meeting between London and Chicago?
There are 3 overlapping standard business hours (09:00 - 17:00) between London and Chicago. The optimal window is when both parties are in their core working shifts.
Does daylight saving time (DST) affect the time difference between London and Chicago?
Yes. If either United Kingdom or United States observes seasonal Daylight Saving Time transitions, the offset difference shifts by one hour on scheduled transition dates.