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

Return flights

24 Dec - 28 Jan	Delta
04 Dec - 28 Jan	Delta
25 Dec - 20 Jan	Delta
25 Dec - 22 Jan	Delta
28 Dec - 28 Jan	LATAM Airlines Group
04 Dec - 10 Dec	Air France
02 Dec - 10 Dec	Air France
02 Dec - 08 Dec	Delta
06 Dec - 08 Dec	Delta
04 Dec - 08 Dec	Delta
03 Dec - 08 Dec	Delta
05 Dec - 06 Dec	Delta
05 Dec - 07 Dec	Delta
01 Dec - 05 Dec	Air France
03 Dec - 10 Dec	Air France
28 Dec - 26 Jan	LATAM Airlines Group
23 Dec - 26 Jan	Delta
30 Dec - 18 Jan	Delta
23 Dec - 23 Jan	Delta
30 Dec - 30 Jan	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 875€

Return flights