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

Return flights

06 Dec - 15 Dec	Wizz Air UK
05 Dec - 15 Dec	Vueling Airlines
06 Dec - 16 Dec	Wizz Air UK
05 Dec - 14 Dec	Vueling Airlines
04 Dec - 13 Dec	Air Europa
01 Dec - 22 Dec	Vueling Airlines
03 Dec - 16 Dec	Vueling Airlines
04 Dec - 22 Jan	Vueling Airlines
03 Dec - 10 Dec	Vueling Airlines
03 Dec - 15 Dec	Vueling Airlines
04 Dec - 14 Dec	easyJet
06 Dec - 24 Jan	Vueling Airlines
28 Dec - 18 Jan	Vueling Airlines
26 Dec - 31 Jan	Vueling Airlines
29 Dec - 23 Jan	easyJet
11 Dec - 07 Jan	Wizz Air UK
04 Dec - 17 Jan	Vueling Airlines
27 Dec - 17 Jan	Vueling Airlines
13 Dec - 07 Jan	Wizz Air UK
13 Dec - 04 Jan	Wizz Air UK

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 $1154

Return flights