Thunder Bay to Chicago time converter

Chicago is 1 hour behind Thunder Bay. When it is 9:00 AM in Thunder Bay, it is 8:00 AM in Chicago.

Thunder Bay EDT

Sunday, October 18, 2026

Chicago CDT

Sunday, October 18, 2026

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

Thunder Bay to Chicago conversion table

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

Thunder BayChicago
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 Thunder Bay (9:00 AM – 5:00 PM in Chicago).

Daylight saving time and the difference

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

  • Oct 18, 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 18, 2027: -1h

Distance

Thunder Bay and Chicago are 737 km (458 miles) apart in a straight line.

More conversions

Chicago to Thunder BayThunder Bay to New YorkThunder Bay to LondonThunder Bay to Los AngelesThunder Bay to TorontoThunder Bay to São PauloThunder Bay to ParisThunder Bay to BerlinThunder Bay to MoscowThunder Bay to DubaiThunder Bay to New DelhiThunder Bay to BangkokThunder Bay 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 Thunder Bay and Chicago?

Chicago is 1 hour behind Thunder Bay.

What time is it in Chicago when it is 9 AM in Thunder Bay?

When it is 9:00 AM in Thunder Bay, it is 8:00 AM in Chicago.

When is the best time to call Chicago from Thunder Bay?

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

Does the time difference between Thunder Bay 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.