Working-hour overlap
When both cities are at work
9:00–11:00 in Chicago overlaps with 15:00–17:00 in London.
Time converter
Chicago to London
United States
Chicago
6:5832
Wednesday, 29 July 2026GMT-5 · UTC−5
United Kingdom
London
12:5832
Wednesday, 29 July 2026BST · UTC+1
Working together
The useful part of the difference
A major central-US to UK business and travel route.
Calendar boundary
Check the date, not just the hour
At 09:00 in Chicago, London is on the same calendar date.
Daylight saving time
The gap can move during the year
The usual gap is stable in the January and July reference dates at 6 hours ahead.