São Paulo is 2 hours ahead of Atlanta during US winter (EST), and 1 hour ahead during US summer (EDT). When it's 9:00 AM in Atlanta, it's 10:00 AM or 11:00 AM in São Paulo.
Brazil (most regions) uses BRT (UTC-3) year-round and no longer observes DST.
Business hours overlap significantly! 9:00 AM - 5:00 PM Atlanta corresponds to 10:00 AM - 7:00 PM São Paulo. The manageable time difference makes coordination convenient.
Delta and LATAM operate direct flights between Atlanta and São Paulo Guarulhos International Airport.