São Paulo and Buenos Aires are usually in the same timezone (UTC-3). However, Brazil occasionally observes DST while Argentina does not, creating a 1-hour difference during those periods. When both are on standard time, 9:00 AM in Buenos Aires is also 9:00 AM in São Paulo.
Both cities are South America's largest financial centers, making coordination crucial for Mercosur business.
Any time during standard time! Business hours align perfectly most of the year. Check DST status if calling during Brazilian summer (November-February).
Buenos Aires and São Paulo are connected by frequent 2.5-hour flights, making same-day business trips common between South America's two largest cities.