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

Return flights

01 Dec - 07 Dec	Ryanair
04 Dec - 11 Dec	easyJet
12 Dec - 24 Jan	Ryanair
14 Dec - 20 Dec	easyJet
04 Dec - 20 Dec	easyJet
29 Dec - 13 Jan	Ryanair
16 Dec - 27 Dec	easyJet
08 Dec - 27 Dec	Ryanair
14 Dec - 29 Dec	easyJet
24 Dec - 01 Jan	easyJet
24 Dec - 31 Dec	easyJet
24 Dec - 10 Jan	easyJet
31 Dec - 06 Jan	easyJet
14 Dec - 01 Jan	easyJet
09 Dec - 10 Jan	easyJet
14 Dec - 10 Jan	easyJet
14 Dec - 28 Dec	easyJet
17 Dec - 31 Dec	easyJet
30 Dec - 08 Jan	easyJet
30 Dec - 06 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 $1311

Return flights