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

Return flights

09 Dec - 27 Jan	GOL Linhas Aéreas
09 Dec - 29 Jan	GOL Linhas Aéreas
01 Dec - 31 Dec	GOL Linhas Aéreas
09 Dec - 28 Jan	GOL Linhas Aéreas
01 Dec - 10 Dec	GOL Linhas Aéreas
06 Dec - 13 Jan	LATAM Airlines Group
01 Dec - 15 Dec	GOL Linhas Aéreas
17 Dec - 23 Jan	Air Europa	direct
22 Dec - 28 Jan	Air Europa	direct
06 Dec - 13 Jan	Air Europa	direct
20 Dec - 01 Jan	Air Europa	direct
17 Dec - 29 Dec	Air Europa	direct
20 Dec - 27 Dec	Avianca
27 Dec - 24 Jan	Emirates
26 Dec - 24 Jan	Emirates

Also check the deals for one-way flights from Asuncion to Madrid 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 Asuncion to Madrid in December from 673€

Return flights