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

Return flights

01 Dec - 07 Dec	Vueling Airlines
22 Dec - 22 Jan	Vueling Airlines
15 Dec - 12 Jan	Vueling Airlines
14 Dec - 10 Jan	LATAM Airlines Group
19 Dec - 07 Jan	Air Europa
20 Dec - 10 Jan	Vueling Airlines
13 Dec - 11 Jan	LATAM Airlines Group

Also check the deals for one-way flights from Bilbao 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 Bilbao to Asuncion in December from $1200

Return flights