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

Return flights

08 Dec - 14 Dec	Air Canada
11 Dec - 12 Jan	Air Canada
04 Dec - 11 Dec	Air Canada
29 Dec - 31 Jan	Turkish Airlines
30 Dec - 19 Jan	British Airways
05 Dec - 14 Dec	Air Canada
03 Dec - 14 Dec	British Airways
03 Dec - 19 Dec	British Airways
04 Dec - 18 Dec	British Airways
06 Dec - 13 Dec	British Airways
28 Dec - 30 Jan	LATAM Airlines Group
14 Dec - 15 Jan	Air Canada
06 Dec - 20 Dec	British Airways
15 Dec - 15 Jan	Air Canada
12 Dec - 15 Jan	Air Canada
10 Dec - 20 Dec	Iberia
15 Dec - 08 Jan	Aeromexico
25 Dec - 08 Jan	Aeromexico
05 Dec - 25 Dec	Vueling Airlines
14 Dec - 08 Jan	Aeromexico

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 $1062

Return flights