Porto to O'Fallon time converter

O'Fallon is 6 hours behind Porto. When it is 9:00 AM in Porto, it is 3:00 AM in O'Fallon.

Porto WEST

Wednesday, October 21, 2026

O'Fallon CDT

Wednesday, October 21, 2026

Porto
Portugal
Wed, Oct 21
WESTUTC+1
O'Fallon
Illinois, United States
Wed, Oct 21
CDTUTC-5-6h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to O'Fallon conversion table

Every hour of today in Porto and the matching time in O'Fallon. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Both sides are at work from 3:00 PM – 6:00 PM in Porto (9:00 AM – 12:00 PM in O'Fallon).

Daylight saving time and the difference

The difference changes during the year because Porto and O'Fallon switch clocks on different dates:

  • Oct 21, 2026 – Oct 25, 2026: -6h
  • Oct 25, 2026 – Nov 1, 2026: -5h
  • Nov 1, 2026 – Mar 14, 2027: -6h
  • Mar 14, 2027 – Mar 28, 2027: -5h
  • Mar 28, 2027 – Oct 21, 2027: -6h

Distance

Porto and O'Fallon are 6,676 km (4,148 miles) apart in a straight line.

More conversions

O'Fallon to PortoPorto to New YorkPorto to LondonPorto to Los AngelesPorto to ChicagoPorto to TorontoPorto to São PauloPorto to ParisPorto to BerlinPorto to MoscowPorto to DubaiPorto to New DelhiPorto to Bangkok
New York to O'FallonLondon to O'FallonLos Angeles to O'FallonChicago to O'FallonToronto to O'FallonSão Paulo to O'FallonParis to O'FallonBerlin to O'FallonMoscow to O'FallonDubai to O'FallonNew Delhi to O'FallonBangkok to O'Fallon

Questions and answers

What is the time difference between Porto and O'Fallon?

O'Fallon is 6 hours behind Porto.

What time is it in O'Fallon when it is 9 AM in Porto?

When it is 9:00 AM in Porto, it is 3:00 AM in O'Fallon.

When is the best time to call O'Fallon from Porto?

Both sides are at work from 3:00 PM – 6:00 PM in Porto (9:00 AM – 12:00 PM in O'Fallon).

Does the time difference between Porto and O'Fallon change?

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