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

Return flights

12 Dec - 01 Jan	LATAM Airlines Group
15 Dec - 15 Jan	LATAM Airlines Group
18 Dec - 11 Jan	Avianca
13 Dec - 28 Dec	Avianca
07 Dec - 27 Dec	Avianca
12 Dec - 23 Dec	Avianca
10 Dec - 30 Dec	Avianca
04 Dec - 23 Dec	Avianca
15 Dec - 25 Dec	Avianca
16 Dec - 03 Jan	Avianca
23 Dec - 03 Jan	Avianca
07 Dec - 26 Dec	Avianca
08 Dec - 18 Dec	LATAM Airlines Group
22 Dec - 03 Jan	Avianca
24 Dec - 08 Jan	Avianca
15 Dec - 02 Jan	Avianca
14 Dec - 29 Dec	Avianca
24 Dec - 04 Jan	Avianca
08 Dec - 21 Dec	Avianca
31 Dec - 17 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 1064€

Return flights