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

Return flights

01 Dec - 12 Dec	LATAM Airlines Group
10 Dec - 19 Jan	Delta
09 Dec - 28 Jan	Delta
09 Dec - 20 Jan	Delta
29 Dec - 26 Jan	Delta
31 Dec - 19 Jan	Delta
07 Dec - 19 Jan	Delta
08 Dec - 19 Jan	Delta
04 Dec - 28 Jan	Delta
10 Dec - 20 Jan	Delta
04 Dec - 10 Dec	Air France
06 Dec - 23 Dec	Delta
23 Dec - 18 Jan	Delta
04 Dec - 14 Dec	LATAM Airlines Group
01 Dec - 29 Dec	Delta
08 Dec - 30 Dec	Delta
08 Dec - 29 Dec	Delta
11 Dec - 29 Dec	TAAG Angola Airlines
01 Dec - 19 Dec	Lufthansa
13 Dec - 30 Dec	Delta

Also check the deals for one-way flights from Lisbon to Buenos Aires 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 Lisbon to Buenos Aires in December from $1034

Return flights