Originally Posted by VidaNaPraia

So you would go from the far north of the country to an airport 350 km further south than you want to be and buy yet another ticket to immediately get on another plane to go back north again that same 350 km?

I was looking just now at flights on GOL about 10 weeks out, as an example.
São Paulo to Manaus is as cheap as $253 one way.
Manaus to Rio is as cheap as $275 one way.
(Yes, cheapest fares usually are for less convenient times, but it's an example.)
So tell me again why you're going to fly to S.P. and take a second flight to go back where you want to be?