Campinas is a pretty big city but its Viracopos Airport doesn't look like it..... It is very modern though but has the feel of a sleepy smalltown airport even though there's a gigantic sign in the main check in hall saying that ( supposedly ) Viracopos is or will be the largest, biggest, busiest cargo airport of Brazil or Latin America or South America, whatever..... it's got the runways for the big ones which actually land here, FedEx, USP, DHL and others.... and Viracopos ( CPQ ) is also the closest airport to GRU ( São Paulo International Airport Guarulhos ) and CGH ( São Paulo National Airport Congonhas ), so when the weather in São Paulo is REALLY, REALLY bad the planes have somewhere to land..... and weather is almost always better in Campinas than in São Paulo....
Besides all that there are like three or four airlines for passenger flights, taking the traveller to any point in Brazil.... Very practical and relaxing... I've never seen a longer line than maybe 10 people in front of me at the check in, ground personell is very, very friendly and helpfull, there's no real good place to eat though but so what..?? Everything goes so quickly here, usually I find a ( paid ) parking space in the parking lot no more than 50 meters away from the entrance. Check in is quick and efficient ( and I ALWAYS forget to check in online...), there are only four gates and when you board you have to walk up to the plane on the tarmac and climb up stairs on wheels...LOL.... And when it rains the airline will provide you with brandnew looking umbrellas.... What a nice 50's and 60's touch to the flight experience. The planes leaving and arriving here are mostly Boeing 737s and small Air Busses, even a Fokker from time to time but Campinas is linked to all of Brazil in no time. Viracopos is just about the nicest, least stressing airport I know.... ( Viracopos means: turns cups or glasses around.....don't ask me why....)
The trains are not very popular in Brazil, so if you want to travel you should be prepared to spend many hours in the bus.
The buses are really confortable, and they are really good prepared to long trips.
In the rodoviaria you can take buses to the main cities, such as Sao Paulo, Rio de Janeiro, Foz de Iguazu...
The tickets are sold in the second floor and not all companies go to all the cities, so you'll have to ask which company goes to you destiny.
Adress: Rua Barao de Parnaoba, 690 CEP 13.013-170 - Campinas - SP.