Time Difference: Chicago vs London
Chicago
9:29:27 AM CST
Friday, November 13, 2026
6h
6h
London
3:29:27 PM GMT
Friday, November 13, 2026
London is 6 hours ahead of Chicago.
Quick Reference
- Chicago
- CST (GMT-6)
CDT starts on Mar 14, 2027
- London
- GMT (GMT+0)
BST starts on Mar 28, 2027
Frequently Asked Questions
- What is the time difference between Chicago and London?
- London is 6 hours ahead of Chicago.
- When is the best time to call from Chicago to London?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Chicago uses CST and London uses GMT.