They are two airports in Curitiba: Afonso Pena International Airport and Bacacheri Airport. The first is the main airport . It is used for both , international and domestic flights. The second is a smaller general aviation facility.
Inside the city we recommend to use the buses. They are the fastest way to move , Curitiba having the world`s first bus rapid transit. In a car it will be difficult to move , the city having many one way streets. Also you can use a bike , in the city being over 100km of bike routes.