For those arriving at Porto Alegre Airport, the city center can be easilly reached by taxi, public buses, or Uber. Detailed information can be found here:
https://portoalegre-airport.com.br/en/passenger/transportation
Bus lines
The bus line T5 is the line that stops at the closest bus stop near Centro Cultural (bus stop R SANTO ANTONIO). The bus ticket costs 4.80 BRL and can be paid to the bus collector (the guy just past the driver).
Taxis
In case you have luggage or prefer to dive in a taxi as soon as you arrive at the airport, we recommend using the taxi service Cootaero (white cars with blue lines). The trip from the airport to the city costs around 60 BRL.
Uber
App transportation is easy in Porto Alegre. At the airport, there is a designated area for Uber drivers. The typical cost to reach the city center is 50-80 BRL depending on the demand.
Metro
Although not the fatest way to the city center, the metro station can be reached using the elevated train (air train or "aero-móvel") that depart from the level 2 for free. The train arrives at the "Aeroporto" bus/metro station, where Metro Southern line run to the city center. The metro ticket costs 4.50 BRL and can bought at the metro station.
For those arriving at the bus terminal in Porto Alegre, several bus lines can take you to the area surrouding the Centro Cultural, such as 490, 353, and 470. Also, Uber is a convenient option since the cost is manageable.