The airport is about 13 km (8 miles) from the city center. You can get to and from the airport by be reached by taxi or public bus. You can also rent a car at the airport.
Taxis are parked just outside the main terminal and the cost to reach downtown should anywhere between R$40 and R$50. The approximate cost for your specific journey can be calculated here TarifadeTaxi.com
Public buses leave from the front of the terminal about every 30 minutes. The lines that pass here are: 183, 186 a 6120. The cost is about R$ 3,00 and it takes about 30 minutes to get to or from the city center. All of these buses stop at various places in the city center and all pass through the main bus terminal TICEN (Terminal de Integração do Centro).
Buses typically run from 5am till midnight. So if you are coming on a late flight you might not be able to take a bus.