Amsterdam is 4 hours ahead of São Paulo during European winter (CET), and 5 hours ahead during summer (CEST). When it's 9:00 AM in São Paulo, it's 1:00 PM or 2:00 PM in Amsterdam.
Brazil (most regions) uses BRT (UTC-3) year-round and no longer observes DST.
Optimal window: 1:00 PM - 6:00 PM Amsterdam time (9:00 AM - 2:00 PM São Paulo). Afternoon calls from Amsterdam reach morning business hours in São Paulo.
KLM operates direct flights between Amsterdam and São Paulo Guarulhos International Airport.