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

Return flights

06 Dec - 14 Dec	Iberia
01 Dec - 10 Dec	Iberia
03 Dec - 08 Dec	Iberia
29 Dec - 29 Jan	Iberia
01 Dec - 08 Dec	Iberia
03 Dec - 14 Dec	Iberia
02 Dec - 10 Dec	Iberia
02 Dec - 16 Dec	Iberia
02 Dec - 14 Dec	Iberia
05 Dec - 12 Dec	Iberia
05 Dec - 15 Dec	Iberia
24 Dec - 22 Jan	Iberia
30 Dec - 20 Jan	Iberia
12 Dec - 25 Jan	easyJet
03 Dec - 21 Jan	Air Europa
29 Dec - 14 Jan	Air Europa
28 Dec - 13 Jan	Air Europa
27 Dec - 14 Jan	Air Europa
28 Dec - 14 Jan	Air Europa
30 Dec - 17 Jan	Air Europa

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 902€

Return flights