Clockjumper

Time difference

Buenos Aires to St. Louis Time Difference (2026)

St. Louis is 2 hours behind Buenos Aires — when it's 12:00 PM in Buenos Aires, it's 10:00 AM in St. Louis. (Buenos Aires (America/Argentina/Buenos_Aires, GMT-3); St. Louis (America/Chicago, CDT).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.

Quick answer

St. Louis is 2 hours behind Buenos Aires. The best window for a call is 11 AM–5 PM in Buenos Aires, which is 9 AM–3 PM in St. Louis — a 6-hour overlap inside 9 AM–5 PM on both sides. Clocks change on November 1, 2026, which briefly shifts the gap between Buenos Aires and St. Louis — the converter on this page always reflects the correct offset for the date you pick.

  • When it's 9:00 AM in Buenos Aires, it's 7:00 AM in St. Louis.
  • When it's 9:00 AM in St. Louis, it's 11:00 AM in Buenos Aires.

St. Louis is currently 2 hours behind Buenos Aires.

Buenos Aires • GMT-3
12:05 AM
Thursday, Jul 9
St. Louis • CDT
10:05 PM
Wednesday, Jul 8

Interactive converter

12:00PM

12
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Best times to meet

The 9 AM – 5 PM business windows in Buenos Aires and St. Louis overlap for 6 hours. 11 AM–5 PM in Buenos Aires is 9 AM–3 PM in St. Louis. Aim somewhere in the middle of that window so neither side starts cold or finishes drained.

Quick conversion table

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

Daylight saving

On November 1, 2026, St. Louis shifts for daylight saving. After that, St. Louis will be 3 hours behind Buenos Aires (currently 2 hours behind Buenos Aires). The converter and the tables above always reflect the correct offset for the date you pick.

  • Buenos Aires does not observe daylight saving time.
  • St. Louis is currently observing daylight saving time.

Frequently asked questions

Is St. Louis ahead of or behind Buenos Aires?
St. Louis is 2 hours behind Buenos Aires.
How many hours behind Buenos Aires is St. Louis?
St. Louis is 2 hours behind Buenos Aires.
What time is 9 AM in Buenos Aires in St. Louis?
9:00 AM in Buenos Aires is 7:00 AM in St. Louis.
What time is noon in Buenos Aires in St. Louis?
12:00 PM in Buenos Aires is 10:00 AM in St. Louis.
What time is 5 PM in Buenos Aires in St. Louis?
5:00 PM in Buenos Aires is 3:00 PM in St. Louis. Useful for end-of-day handoffs between the two offices.
What time is 3 PM Buenos Aires in St. Louis?
3:00 PM in Buenos Aires is 1:00 PM in St. Louis.
Is Buenos Aires currently observing daylight saving time?
Buenos Aires does not observe daylight saving time — its UTC offset stays the same all year.
Is St. Louis currently observing daylight saving time?
St. Louis is currently observing daylight saving time (summer time).
Do Buenos Aires and St. Louis observe daylight saving?
On November 1, 2026, St. Louis shifts for daylight saving. After that, St. Louis will be 3 hours behind Buenos Aires (currently 2 hours behind Buenos Aires). The converter and the tables above always reflect the correct offset for the date you pick.
When is the best time to call St. Louis from Buenos Aires?
Aim for 11 AM–5 PM in Buenos Aires, which is 9 AM–3 PM in St. Louis.
When is the best time to call Buenos Aires from St. Louis?
Aim for 9 AM–3 PM in St. Louis, which is 11 AM–5 PM in Buenos Aires.
Buenos Aires (GMT-3) to St. Louis (CDT) — how do I convert quickly?
Add −2 hours to Buenos Aires local time to get St. Louis local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.

Other conversions

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Current time in each city

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