AirHint found the following cheapest return flights from Buenos Aires (AEP) to Lisbon (LIS) in December 2025 (see full year).

Return flights

03 Dec - 09 Dec	GOL Linhas Aéreas
05 Dec - 23 Dec	Aerolineas Argentinas
01 Dec - 14 Dec	Aerolineas Argentinas
09 Dec - 28 Dec	Aerolineas Argentinas
12 Dec - 31 Dec	Aerolineas Argentinas
01 Dec - 15 Dec	Aerolineas Argentinas
13 Dec - 31 Dec	Aerolineas Argentinas
12 Dec - 31 Jan	Flybondi
02 Dec - 02 Jan	JetSmart
07 Dec - 14 Dec	LATAM Airlines Group
12 Dec - 28 Dec	Aerolineas Argentinas
15 Dec - 15 Jan	Aerolineas Argentinas
12 Dec - 30 Dec	Aerolineas Argentinas
24 Dec - 19 Jan	Flybondi
25 Dec - 15 Jan	JetSmart
24 Dec - 13 Jan	JetSmart
23 Dec - 12 Jan	JetSmart
15 Dec - 03 Jan	Aerolineas Argentinas
29 Dec - 18 Jan	LATAM Airlines Group
31 Dec - 16 Jan	JetSmart

Also check the deals for one-way flights from Buenos Aires to Lisbon 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 Buenos Aires to Lisbon in December from $1028

Return flights