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

Return flights

03 Dec - 10 Dec	ITA Airways
02 Dec - 07 Dec	Lufthansa
02 Dec - 08 Dec	Lufthansa
01 Dec - 10 Dec	ITA Airways
02 Dec - 09 Dec	SWISS
01 Dec - 08 Dec	Lufthansa
03 Dec - 07 Dec	Lufthansa
02 Dec - 28 Jan	SWISS
02 Dec - 15 Dec	SWISS
03 Dec - 14 Dec	ITA Airways
03 Dec - 09 Dec	Lufthansa
01 Dec - 31 Jan	Lufthansa
02 Dec - 20 Jan	ITA Airways
31 Dec - 31 Jan	Iberia
24 Dec - 17 Jan	Delta
06 Dec - 17 Jan	Delta
24 Dec - 18 Jan	Delta
10 Dec - 13 Jan	Delta
01 Dec - 19 Jan	Lufthansa
11 Dec - 12 Jan	Delta

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 879€

Return flights