São Paulo-Guarulhos International Airport (GRU) is so far it feels like it is in another state. Viracopos–Campinas International Airport (VCP), is even father, in the city of Campinas, yet is a workable alternate to GRU and the city airport, Congonhas (CGH). The three airports all turn up for searches for SAO.
Viracopos is Trip-Azul’s hub and they offer free shuttles for passengers from São Paulo. Other transport options are more complicated. This is about 100 km from downtown São Paulo so primarily an option for those with more time than cash. Or a connecting option for trips throughout Brazil. And in the obscure award possibility category, TAP Portugal has a flight to Lisbon.