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

Return flights

02 Dec - 11 Dec	Air Europa
01 Dec - 15 Dec	Air Europa
08 Dec - 15 Dec	Air Europa
06 Dec - 08 Dec	Air Europa
07 Dec - 15 Jan	Air Europa
10 Dec - 14 Jan	Air Europa
30 Dec - 31 Jan	Vueling Airlines
08 Dec - 24 Dec	Iberia
08 Dec - 22 Jan	Air Europa
13 Dec - 24 Jan	Vueling Airlines
11 Dec - 15 Jan	Air Europa
11 Dec - 14 Jan	Air Europa
13 Dec - 31 Jan	Vueling Airlines
03 Dec - 19 Dec	Air Europa
05 Dec - 19 Dec	Air Europa
27 Dec - 15 Jan	Air Europa
27 Dec - 16 Jan	Air Europa
25 Dec - 29 Dec	Vueling Airlines
14 Dec - 21 Dec	Vueling Airlines
12 Dec - 28 Dec	Vueling Airlines

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 $1040

Return flights