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

Return flights

10 Dec - 26 Jan	GOL Linhas Aéreas
12 Dec - 31 Jan	JetSmart
03 Dec - 10 Dec	JetSmart
12 Dec - 28 Dec	LATAM Airlines Group
10 Dec - 29 Dec	GOL Linhas Aéreas
11 Dec - 31 Dec	LATAM Airlines Group
14 Dec - 30 Dec	JetSmart
07 Dec - 23 Dec	GOL Linhas Aéreas
17 Dec - 20 Jan	LATAM Airlines Group
12 Dec - 27 Dec	LATAM Airlines Group
24 Dec - 26 Jan	Sky Airline
11 Dec - 27 Dec	LATAM Airlines Group
11 Dec - 24 Dec	LATAM Airlines Group
05 Dec - 08 Dec	GOL Linhas Aéreas
21 Dec - 21 Jan	LATAM Airlines Group
17 Dec - 05 Jan	JetSmart
23 Dec - 27 Jan	Flybondi
24 Dec - 09 Jan	JetSmart
24 Dec - 19 Jan	Aerolíneas Argentinas
29 Dec - 24 Jan	LATAM Airlines Group

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 928€

Return flights