Time difference between London and Chicago

Chicago is 6 hours behind London

London, the United Kingdom is UTC · Chicago, the United States is UTC−6 — on standard time

The gap is not the same all year

Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because London goes forward on the last Sunday in March and back on the last Sunday in October and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.

Both change their clocks and both are in the northern hemisphere, but not on the same weekend — London goes forward on the last Sunday in March and Chicago on the second Sunday in March. For the days in between, the gap is neither party's expected figure, and a standing meeting silently moves by an hour. That mismatch is a common cause of a missed international call.

When they can both be at their desks

Nine-to-five in both cities overlaps for 2 hours — 3:00 PM to 5:00 PM in London, the same moment as 9:00 AM to 11:00 AM in Chicago.

London to Chicago, hour by hour

On the usual gap of 6 hours.

Frequently asked questions

Other pairs

• London to Mexico City
• London to Denver
• London to Los Angeles
• London to Vancouver
• London to Anchorage
• London to Honolulu
• London to São Paulo
• London to Buenos Aires
• London to Lima
• London to Lagos

Every London pair · Every Chicago pair · All city pairs · Time zones by abbreviation