Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Jakarta to Curitiba as you normally would.
For a flight from Jakarta to Curitiba, you will be flying into Afonso Pena. Curitiba Afonso Pena (CWB) is just 14.8 km from the centre vof the city. Afonso Pena is the only Curitiba airport and it handles 0 inbound flights from Jakarta per day. 0 airlines have flights to Curitiba Afonso Pena from Jakarta on a regular basis.
This is defined as Jakarta Soekarno-Hatta Intl Airport (CGK) and Curitiba Afonso Pena Airport (CWB). Codes like Curitiba Afonso Pena Airport are often used to just call airports uniquely.