Chicago to Ottawa South time converter

Ottawa South is 1 hour ahead of Chicago. When it is 9:00 AM in Chicago, it is 10:00 AM in Ottawa South.

Chicago CDT

Tuesday, October 20, 2026

Ottawa South EDT

Tuesday, October 20, 2026

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

Chicago to Ottawa South conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

The difference changes during the year because Chicago and Ottawa South 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

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

More conversions

Ottawa South to ChicagoChicago to New YorkChicago to LondonChicago to Los AngelesChicago to TorontoChicago to São PauloChicago to ParisChicago to BerlinChicago to MoscowChicago to DubaiChicago to New DelhiChicago to BangkokChicago to Singapore
New York to Ottawa SouthLondon to Ottawa SouthLos Angeles to Ottawa SouthToronto to Ottawa SouthSão Paulo to Ottawa SouthParis to Ottawa SouthBerlin to Ottawa SouthMoscow to Ottawa SouthDubai to Ottawa SouthNew Delhi to Ottawa SouthBangkok to Ottawa SouthSingapore to Ottawa South

Questions and answers

What is the time difference between Chicago and Ottawa South?

Ottawa South is 1 hour ahead of Chicago.

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

When it is 9:00 AM in Chicago, it is 10:00 AM in Ottawa South.

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

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

Does the time difference between Chicago and Ottawa South change?

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