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

Return flights

01 Dec - 08 Dec	Iberia
06 Dec - 10 Dec	Iberia
02 Dec - 12 Dec	Iberia
02 Dec - 16 Dec	Iberia
06 Dec - 16 Dec	Iberia
04 Dec - 15 Dec	Iberia
01 Dec - 12 Dec	Iberia
01 Dec - 13 Dec	easyJet
07 Dec - 16 Dec	Iberia
06 Dec - 13 Dec	Iberia
29 Dec - 21 Jan	Iberia
01 Dec - 22 Jan	Iberia
04 Dec - 22 Jan	Iberia
06 Dec - 21 Jan	Iberia
24 Dec - 02 Jan	Turkish Airlines
26 Dec - 31 Jan	Iberia
12 Dec - 24 Jan	easyJet
11 Dec - 24 Jan	easyJet
14 Dec - 14 Jan	Vueling Airlines
10 Dec - 20 Jan	Iberia

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 962€

Return flights