Chicago to Ontario time converter

Ontario is 2 hours behind Chicago. When it is 9:00 AM in Chicago, it is 7:00 AM in Ontario.

Chicago CDT

Wednesday, October 21, 2026

Ontario PDT

Wednesday, October 21, 2026

Chicago
Illinois, United States
Wed, Oct 21
CDTUTC-5
Ontario
California, United States
Wed, Oct 21
PDTUTC-7-2h
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Ontario conversion table

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

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

Best time to call or meet

Both sides are at work from 11:00 AM – 6:00 PM in Chicago (9:00 AM – 4:00 PM in Ontario).

Daylight saving time and the difference

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

  • Oct 21, 2026 – Nov 1, 2026: -2h
  • Nov 1, 2026 – Nov 1, 2026: -1h
  • Nov 1, 2026 – Mar 14, 2027: -2h
  • Mar 14, 2027 – Mar 14, 2027: -3h
  • Mar 14, 2027 – Oct 21, 2027: -2h

Distance

Chicago and Ontario are 2,753 km (1,711 miles) apart in a straight line.

More conversions

Ontario 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 OntarioLondon to OntarioLos Angeles to OntarioToronto to OntarioSão Paulo to OntarioParis to OntarioBerlin to OntarioMoscow to OntarioDubai to OntarioNew Delhi to OntarioBangkok to OntarioSingapore to Ontario

Questions and answers

What is the time difference between Chicago and Ontario?

Ontario is 2 hours behind Chicago.

What time is it in Ontario when it is 9 AM in Chicago?

When it is 9:00 AM in Chicago, it is 7:00 AM in Ontario.

When is the best time to call Ontario from Chicago?

Both sides are at work from 11:00 AM – 6:00 PM in Chicago (9:00 AM – 4:00 PM in Ontario).

Does the time difference between Chicago and Ontario change?

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