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

Return flights

04 Dec - 10 Dec	Wizz Air Malta
30 Dec - 28 Jan	Wizz Air Malta
03 Dec - 10 Dec	Wizz Air Malta
07 Dec - 14 Dec	Wizz Air Malta
03 Dec - 14 Dec	Wizz Air Malta
28 Dec - 25 Jan	Wizz Air Malta
04 Dec - 09 Dec	Wizz Air Malta
06 Dec - 09 Dec	easyJet
24 Dec - 24 Jan	Wizz Air Malta
09 Dec - 16 Dec	Wizz Air Malta
28 Dec - 24 Jan	Ryanair
05 Dec - 08 Dec	easyJet
28 Dec - 26 Jan	easyJet
06 Dec - 10 Dec	Wizz Air Malta
31 Dec - 18 Jan	Wizz Air Malta
03 Dec - 09 Dec	easyJet
29 Dec - 15 Jan	Jet2
14 Dec - 15 Jan	Wizz Air Malta
24 Dec - 15 Jan	Wizz Air Malta
25 Dec - 15 Jan	Wizz Air Malta

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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from London to Buenos Aires in December from $1328

Return flights