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

One-Way flights

09 Dec	Aerolineas Argentinas
02 Dec	Aerolineas Argentinas
11 Dec	Aerolineas Argentinas
10 Dec	LATAM Airlines Group
16 Dec	Aerolineas Argentinas
15 Dec	Aerolineas Argentinas
24 Dec	GOL Linhas Aéreas
17 Dec	Aerolineas Argentinas
30 Dec	JetSmart
20 Dec	Avianca

Also check the deals for return 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 one-way flights from Buenos Aires to Lisbon in December from $581

One-Way flights