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

Return flights

02 Dec - 09 Dec	easyJet
04 Dec - 16 Dec	easyJet
04 Dec - 14 Dec	easyJet
01 Dec - 22 Dec	easyJet
05 Dec - 12 Dec	easyJet
06 Dec - 16 Dec	easyJet
08 Dec - 16 Dec	easyJet
03 Dec - 06 Dec	easyJet
05 Dec - 22 Dec	easyJet
10 Dec - 14 Dec	easyJet
13 Dec - 31 Jan	easyJet
10 Dec - 20 Jan	easyJet
15 Dec - 22 Jan	easyJet
29 Dec - 17 Jan	easyJet
27 Dec - 17 Jan	easyJet
16 Dec - 13 Jan	easyJet
30 Dec - 13 Jan	easyJet
11 Dec - 10 Jan	easyJet
16 Dec - 20 Jan	easyJet
30 Dec - 24 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 1106€

Return flights