Great Falls to Chicago time converter

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

Great Falls MDT

Sunday, October 18, 2026

Chicago CDT

Sunday, October 18, 2026

Great Falls
Montana, United States
Sun, Oct 18
MDTUTC-6
Chicago
Illinois, United States
Sun, Oct 18
CDTUTC-5+1h
Finding your time zone…
Shared working hours (9:00–18:00)

Great Falls to Chicago conversion table

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

Great FallsChicago
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 Great Falls (10:00 AM – 6:00 PM in Chicago).

Daylight saving time and the difference

The difference changes during the year because Great Falls 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

Great Falls and Chicago are 1,964 km (1,220 miles) apart in a straight line.

More conversions

Chicago to Great FallsGreat Falls to New YorkGreat Falls to LondonGreat Falls to Los AngelesGreat Falls to TorontoGreat Falls to São PauloGreat Falls to ParisGreat Falls to BerlinGreat Falls to MoscowGreat Falls to DubaiGreat Falls to New DelhiGreat Falls to BangkokGreat Falls 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 Great Falls and Chicago?

Chicago is 1 hour ahead of Great Falls.

What time is it in Chicago when it is 9 AM in Great Falls?

When it is 9:00 AM in Great Falls, it is 10:00 AM in Chicago.

When is the best time to call Chicago from Great Falls?

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

Does the time difference between Great Falls 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.