Cheapest return flights from London to Buenos Aires in December from $1204

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

Return flights

02 Dec - 10 Dec LATAM Airlines Group
03 Dec - 10 Dec LATAM Airlines Group
01 Dec - 08 Dec LATAM Airlines Group
04 Dec - 10 Dec LATAM Airlines Group
03 Dec - 12 Dec Avianca
07 Dec - 16 Dec Avianca
05 Dec - 08 Dec TAP
03 Dec - 13 Dec TAP
07 Dec - 13 Dec LATAM Airlines Group
07 Dec - 17 Dec Avianca
30 Dec - 26 Jan LATAM Airlines Group
29 Dec - 26 Jan LATAM Airlines Group
26 Dec - 20 Jan Iberia
29 Dec - 25 Jan Vueling Airlines
29 Dec - 23 Jan Vueling Airlines
30 Dec - 20 Jan LATAM Airlines Group
31 Dec - 18 Jan LATAM Airlines Group
29 Dec - 22 Jan LATAM Airlines Group
31 Dec - 19 Jan Vueling Airlines
31 Dec - 16 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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