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

Return flights

05 Dec - 09 Dec	Norse Atlantic Airways (UK)
01 Dec - 09 Dec	Vueling Airlines
02 Dec - 06 Dec	Air Europa
02 Dec - 09 Dec	Air Europa
02 Dec - 15 Dec	Air Europa
05 Dec - 15 Dec	Air Europa
04 Dec - 10 Dec	Air Europa
04 Dec - 09 Dec	easyJet
05 Dec - 11 Dec	Norse Atlantic Airways (UK)
05 Dec - 22 Jan	Norse Atlantic Airways (UK)
05 Dec - 12 Dec	Norse Atlantic Airways (UK)
08 Dec - 22 Jan	Norse Atlantic Airways (UK)
27 Dec - 24 Jan	Vueling Airlines
30 Dec - 18 Jan	Vueling Airlines
10 Dec - 24 Jan	easyJet
31 Dec - 25 Jan	easyJet
09 Dec - 22 Jan	easyJet
16 Dec - 27 Jan	easyJet
10 Dec - 16 Jan	easyJet
29 Dec - 31 Jan	easyJet

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 956€

Return flights