This page provides some useful information about the São Paulo International Airport (Guarulhos, airport code GRU).
Information about the Rio de Janeiro International Airport (Galeão, airport code GIG) can be found at those pages:
International Airport of São Paulo (IATA code GRU, ICAO code SBGR) is
officially called "André Franco Montoro International Airport" after
the name of a former governor of the State of São Paulo, but it is
popularly known as Guarulhos Airport (from the name of the municipality
where it was built) or Cumbica Airport (after the district where it is
located). It is the busiest airport in Latin America, having served
about 39 million passengers in 2015.
The airport is located 25 km (16 miles) from downtown São Paulo.
airport has currently three passenger terminals, numbered 1, 2, and 3,
according to their order along the airport access road when arriving
from the city.
Terminal 1 (checkin A) is the smallest and simplest. It has only
domestic flights, and as of July 2016, only two airlines operate there:
Azul and Passaredo. Terminal 1 has no jet bridges and no direct access
to the other terminals, which can only be reached by a free shuttle bus.
Terminal 2 (checkin B, C, D, E) is the oldest and largest, and for many
years was the sole airport terminal, containing two wings. It has the
majority of domestic flights and to Latin American destinations, as
well as a few intercontinental flights.
Terminal 3 (checkin F, G, H) is the newest and most modern. It has only
international flights and concentrates most long-haul intercontinental
traffic, in addition to the LATAM Group's Latin American flights.
2 and 3 are directly linked by a walkway. It is also possible to move
between the three terminals using a free shuttle bus service, with
intervals of about 10 minutes.
You can check at this link the companies that operate at each of the three terminals, and their destinations.
arriving to the airport, you can contact the information desks (see
image above), where the personel will be able to give you assistance in