AirHint found the following cheapest return flights from London (LCY) to Buenos Aires (EZE) in December 2026 (see full year).

Return flights

02 Dec - 09 Dec	Iberia
02 Dec - 16 Dec	Iberia
08 Dec - 15 Dec	Iberia
07 Dec - 14 Dec	Iberia
02 Dec - 11 Dec	Iberia
07 Dec - 13 Dec	Iberia
04 Dec - 18 Dec	Iberia
02 Dec - 13 Dec	Iberia
15 Dec - 24 Dec	SWISS
04 Dec - 20 Dec	KLM
02 Dec - 01 Jan	ITA Airways
28 Dec - 10 Jan	KLM
27 Dec - 09 Jan	KLM
26 Dec - 09 Jan	KLM
24 Dec - 09 Jan	Lufthansa
24 Dec - 05 Jan	Lufthansa
24 Dec - 11 Jan	Lufthansa
24 Dec - 10 Jan	Lufthansa
24 Dec - 12 Jan	Lufthansa
25 Dec - 09 Jan	KLM

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 1074€

Return flights