Cheapest return flights from London to Buenos Aires in December from $1212

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

Return flights

03 Dec - 14 Dec LATAM Airlines Group
05 Dec - 14 Dec LATAM Airlines Group
04 Dec - 11 Dec LATAM Airlines Group
05 Dec - 31 Dec LATAM Airlines Group
08 Dec - 14 Dec LATAM Airlines Group
27 Dec - 25 Jan LATAM Airlines Group
06 Dec - 13 Dec LATAM Airlines Group
11 Dec - 11 Jan LATAM Airlines Group
03 Dec - 19 Dec British Airways
11 Dec - 12 Jan LATAM Airlines Group
10 Dec - 30 Dec LATAM Airlines Group
04 Dec - 18 Dec British Airways
10 Dec - 15 Dec LATAM Airlines Group
23 Dec - 25 Jan LATAM Airlines Group
23 Dec - 19 Jan LATAM Airlines Group
23 Dec - 24 Jan LATAM Airlines Group
22 Dec - 24 Jan LATAM Airlines Group
10 Dec - 13 Jan LATAM Airlines Group
14 Dec - 08 Jan Lufthansa
24 Dec - 11 Jan LATAM Airlines Group

Also check the deals for one-way flights from London to Buenos Aires in December.

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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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