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

Return flights

04 Dec - 07 Dec	Vueling Airlines
21 Dec - 23 Jan	Vueling Airlines
04 Dec - 11 Dec	Vueling Airlines
02 Dec - 10 Dec	Vueling Airlines
02 Dec - 08 Dec	Vueling Airlines
01 Dec - 06 Dec	Vueling Airlines
12 Dec - 24 Dec	LATAM Airlines Group
02 Dec - 12 Dec	Vueling Airlines
03 Dec - 08 Dec	Vueling Airlines
25 Dec - 25 Jan	Vueling Airlines
26 Dec - 25 Jan	Vueling Airlines
10 Dec - 30 Dec	Vueling Airlines
06 Dec - 27 Dec	Vueling Airlines
26 Dec - 02 Jan	LATAM Airlines Group
25 Dec - 18 Jan	Vueling Airlines
25 Dec - 10 Jan	Vueling Airlines
02 Dec - 13 Jan	Vueling Airlines
30 Dec - 18 Jan	Vueling Airlines
24 Dec - 19 Jan	Vueling Airlines
30 Dec - 11 Jan	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 $1290

Return flights