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

Return flights

02 Dec - 03 Dec	Azul Airlines
20 Dec - 23 Dec	Azul Airlines
23 Dec - 26 Dec	Azul Airlines
20 Dec - 06 Jan	Azul Airlines
27 Dec - 06 Jan	Azul Airlines
27 Dec - 03 Jan	GOL Linhas Aéreas
26 Dec - 01 Jan	LATAM Airlines Group
23 Dec - 27 Dec	GOL Linhas Aéreas

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 302€

Return flights