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

Return flights

31 Dec - 28 Jan	Wizz Air Malta
29 Dec - 20 Jan	Turkish Airlines
31 Dec - 22 Jan	Iberia
31 Dec - 21 Jan	Iberia
30 Dec - 21 Jan	Iberia
26 Dec - 26 Jan	Delta
26 Dec - 20 Jan	Delta
30 Dec - 20 Jan	Turkish Airlines
23 Dec - 21 Jan	Delta
27 Dec - 19 Jan	Iberia
24 Dec - 30 Dec	Delta
23 Dec - 30 Dec	Delta
24 Dec - 31 Dec	Iberia
26 Dec - 28 Dec	Delta
25 Dec - 28 Dec	Delta
27 Dec - 28 Dec	Delta
23 Dec - 28 Dec	Delta
25 Dec - 31 Dec	Air France
22 Dec - 29 Dec	Delta
21 Dec - 24 Dec	Lufthansa

Also check the deals for one-way flights from London 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 London to Buenos Aires in December from 987€

Return flights