Chicago to Great Falls time converter

Great Falls is 1 hour behind Chicago. When it is 9:00 AM in Chicago, it is 8:00 AM in Great Falls.

Chicago CDT

Sunday, October 18, 2026

Great Falls MDT

Sunday, October 18, 2026

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

Chicago to Great Falls conversion table

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

ChicagoGreat Falls
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 Chicago (9:00 AM – 5:00 PM in Great Falls).

Daylight saving time and the difference

The difference changes during the year because Chicago and Great Falls 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

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

More conversions

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New York to Great FallsLondon to Great FallsLos Angeles to Great FallsToronto to Great FallsSão Paulo to Great FallsParis to Great FallsBerlin to Great FallsMoscow to Great FallsDubai to Great FallsNew Delhi to Great FallsBangkok to Great FallsSingapore to Great Falls

Questions and answers

What is the time difference between Chicago and Great Falls?

Great Falls is 1 hour behind Chicago.

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

When it is 9:00 AM in Chicago, it is 8:00 AM in Great Falls.

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

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

Does the time difference between Chicago and Great Falls change?

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