Istanbul is usually 8 hours ahead of Chicago. Chicago observes daylight saving time and Istanbul does not, so the difference shifts by an hour around the changeovers.

IstanbulChicago

Sunrise 5:50 AMSunset 8:32 PM(local)

Sunrise 5:34 AMSunset 8:22 PM(local)

Chicago: daylight saving timeNow UTC-5 CDT. Next change: November 1, 2026 — clocks go back 1 hour.
IstanbulUTC+3
ChicagoUTC-5CDT

🇹🇷 Istanbul

Dialing code+90
Population15,701,602
Coordinates41.01°N, 28.95°E
Elevation39 m

🇺🇸 Chicago

Dialing code+1
Population2,664,452
Coordinates41.85°N, 87.65°W
Elevation179 m

Best time for a call: 17:00–18:00 in IstanbulAdd to calendar

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Istanbul and Chicago?
Istanbul is 8 hours ahead of Chicago. Use the side-by-side clocks and the day/night strips above to convert any hour between them.
When is the best time to call between Istanbul and Chicago?
The best window to call is 17:00–18:00 Istanbul time, when working hours overlap in both cities. Pick an hour on the strips to add it to your calendar.
Why does the time difference between Istanbul and Chicago change?
Because at least one of Istanbul and Chicago observes daylight saving time, the difference shifts by an hour when one city changes its clocks and the other has not yet (or does not).