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

Return flights

01 Dec - 15 Dec	Air Europa
01 Dec - 14 Dec	Air Europa
06 Dec - 11 Dec	Wizz Air UK
03 Dec - 15 Dec	Air Europa
04 Dec - 15 Dec	Air Europa
05 Dec - 07 Dec	Vueling Airlines
03 Dec - 10 Dec	Air Europa
02 Dec - 10 Dec	Air Europa
05 Dec - 12 Dec	Vueling Airlines
05 Dec - 11 Dec	Vueling Airlines
30 Dec - 19 Jan	Wizz Air Malta
15 Dec - 29 Jan	Wizz Air UK
11 Dec - 11 Jan	Wizz Air UK
26 Dec - 10 Jan	easyJet
11 Dec - 09 Jan	Wizz Air UK
05 Dec - 16 Jan	Vueling Airlines
10 Dec - 20 Jan	easyJet
18 Dec - 29 Jan	Wizz Air UK
24 Dec - 16 Jan	Vueling Airlines
15 Dec - 11 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 903€

Return flights