Ottawa South to Chicago time converter

Chicago is 1 hour behind Ottawa South. When it is 9:00 AM in Ottawa South, it is 8:00 AM in Chicago.

Ottawa South EDT

Tuesday, October 20, 2026

Chicago CDT

Tuesday, October 20, 2026

Ottawa South
Ontario, Canada
Tue, Oct 20
EDTUTC-4
Chicago
Illinois, United States
Tue, Oct 20
CDTUTC-5-1h
Finding your time zone…
Shared working hours (9:00–18:00)

Ottawa South to Chicago conversion table

Every hour of today in Ottawa South and the matching time in Chicago. Light rows are typical working hours (9:00–18:00).

Ottawa SouthChicago
12:00 AM11:00 PM−1 day
1:00 AM12:00 AM
2:00 AM1:00 AM
3:00 AM2:00 AM
4:00 AM3:00 AM
5:00 AM4:00 AM
6:00 AM5:00 AM
7:00 AM6:00 AM
8:00 AM7:00 AM
9:00 AM8:00 AM
10:00 AM9:00 AM
11:00 AM10:00 AM
12:00 PM11:00 AM
1:00 PM12:00 PM
2:00 PM1:00 PM
3:00 PM2:00 PM
4:00 PM3:00 PM
5:00 PM4:00 PM
6:00 PM5:00 PM
7:00 PM6:00 PM
8:00 PM7:00 PM
9:00 PM8:00 PM
10:00 PM9:00 PM
11:00 PM10:00 PM

Best time to call or meet

Both sides are at work from 10:00 AM – 6:00 PM in Ottawa South (9:00 AM – 5:00 PM in Chicago).

Daylight saving time and the difference

The difference changes during the year because Ottawa South and Chicago switch clocks on different dates:

  • Oct 20, 2026 – Nov 1, 2026: -1h
  • Nov 1, 2026 – Nov 1, 2026: ±0
  • Nov 1, 2026 – Mar 14, 2027: -1h
  • Mar 14, 2027 – Mar 14, 2027: -2h
  • Mar 14, 2027 – Oct 20, 2027: -1h

Distance

Ottawa South and Chicago are 1,039 km (646 miles) apart in a straight line.

More conversions

Chicago to Ottawa SouthOttawa South to New YorkOttawa South to LondonOttawa South to Los AngelesOttawa South to TorontoOttawa South to São PauloOttawa South to ParisOttawa South to BerlinOttawa South to MoscowOttawa South to DubaiOttawa South to New DelhiOttawa South to BangkokOttawa South to Singapore
New York to ChicagoLondon to ChicagoLos Angeles to ChicagoToronto to ChicagoSão Paulo to ChicagoParis to ChicagoBerlin to ChicagoMoscow to ChicagoDubai to ChicagoNew Delhi to ChicagoBangkok to ChicagoSingapore to Chicago

Questions and answers

What is the time difference between Ottawa South and Chicago?

Chicago is 1 hour behind Ottawa South.

What time is it in Chicago when it is 9 AM in Ottawa South?

When it is 9:00 AM in Ottawa South, it is 8:00 AM in Chicago.

When is the best time to call Chicago from Ottawa South?

Both sides are at work from 10:00 AM – 6:00 PM in Ottawa South (9:00 AM – 5:00 PM in Chicago).

Does the time difference between Ottawa South and Chicago change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.