AirHint found the following cheapest return flights from Curitiba (CWB) to Asuncion (ASU) in December 2025 (see full year).

Return flights

06 Dec - 13 Dec	Azul Airlines
20 Dec - 26 Dec	Azul Airlines
22 Dec - 23 Dec	Azul Airlines
20 Dec - 22 Dec	Azul Airlines
16 Dec - 27 Dec	Azul Airlines
21 Dec - 23 Dec	LATAM Airlines Group
20 Dec - 10 Jan	Azul Airlines	direct
22 Dec - 27 Dec	Azul Airlines	direct
27 Dec - 03 Jan	Azul Airlines	direct
29 Dec - 05 Jan	Azul Airlines

Also check the deals for one-way flights from Curitiba to Asuncion in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Curitiba to Asuncion in December from 293€

Return flights