Cheapest return flights from London to Buenos Aires in December from $1208

Best time to book flights for London (LON) to Buenos Aires (AEP) flights at AirHint

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

Return flights

06 Dec - 13 Dec Air Canada
30 Dec - 20 Jan LATAM Airlines Group
24 Dec - 24 Jan LATAM Airlines Group
04 Dec - 11 Dec British Airways
26 Dec - 17 Jan LATAM Airlines Group
08 Dec - 28 Dec LATAM Airlines Group
30 Dec - 14 Jan LATAM Airlines Group
08 Dec - 18 Dec LATAM Airlines Group
14 Dec - 21 Dec LATAM Airlines Group
28 Dec - 13 Jan LATAM Airlines Group
12 Dec - 22 Dec LATAM Airlines Group
29 Dec - 12 Jan LATAM Airlines Group
11 Dec - 27 Dec LATAM Airlines Group
28 Dec - 08 Jan LATAM Airlines Group
10 Dec - 17 Dec LATAM Airlines Group
26 Dec - 09 Jan LATAM Airlines Group
12 Dec - 07 Jan LATAM Airlines Group
18 Dec - 31 Dec LATAM Airlines Group
19 Dec - 31 Jan LATAM Airlines Group
19 Dec - 31 Dec 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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