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

Return flights

12 Dec - 02 Jan	LATAM Airlines Group
25 Dec - 28 Jan	Aerolineas Argentinas
20 Dec - 20 Jan	Aerolineas Argentinas
15 Dec - 28 Jan	LATAM Airlines Group
10 Dec - 30 Dec	Avianca
08 Dec - 31 Dec	Avianca
16 Dec - 30 Dec	Avianca
12 Dec - 30 Dec	Avianca
13 Dec - 29 Dec	Avianca
11 Dec - 27 Dec	Avianca
24 Dec - 13 Jan	Avianca
16 Dec - 03 Jan	Avianca
12 Dec - 25 Dec	Avianca
15 Dec - 27 Dec	Avianca
14 Dec - 29 Dec	Avianca
16 Dec - 02 Jan	Avianca
26 Dec - 14 Jan	Avianca
10 Dec - 26 Dec	Avianca
18 Dec - 04 Jan	Avianca
23 Dec - 04 Jan	Avianca

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 $1295

Return flights