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

Return flights

13 Dec - 16 Dec	Azul Airlines
06 Dec - 13 Dec	Azul Airlines
02 Dec - 20 Dec	Azul Airlines
27 Dec - 03 Jan	Azul Airlines	direct
20 Dec - 26 Dec	Azul Airlines
20 Dec - 27 Dec	Azul Airlines	direct
27 Dec - 29 Dec	Azul Airlines	direct
18 Dec - 25 Dec	LATAM Airlines Group
20 Dec - 03 Jan	Azul Airlines	direct

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 $318

Return flights