São Paulo is 6 hours behind Istanbul
Best overlap: 2:00 PM to 6:00 PM in Istanbul is 8:00 AM to 12:00 PM in São Paulo.
Aim for 2:00 PM to 6:00 PM Istanbul time — that's 8:00 AM to 12:00 PM over in São Paulo. São Paulo is 6 hours behind Istanbul, which gives you a solid 4-hour window. Book earlier in it and neither side is rushing.