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

Return flights

01 Dec - 08 Dec	ITA Airways
01 Dec - 15 Dec	ITA Airways
01 Dec - 11 Dec	ITA Airways
04 Dec - 14 Dec	ITA Airways
01 Dec - 14 Dec	ITA Airways
05 Dec - 12 Dec	ITA Airways
01 Dec - 13 Dec	ITA Airways
07 Dec - 14 Dec	ITA Airways
06 Dec - 11 Dec	ITA Airways
08 Dec - 14 Dec	Iberia
04 Dec - 13 Jan	Delta
29 Dec - 14 Jan	Delta
31 Dec - 20 Jan	Lufthansa
30 Dec - 24 Jan	Iberia
10 Dec - 20 Jan	ITA Airways
29 Dec - 21 Jan	Lufthansa
13 Dec - 20 Jan	ITA Airways
30 Dec - 12 Jan	Delta
30 Dec - 14 Jan	Delta
31 Dec - 11 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 967€

Return flights