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

Return flights

01 Dec - 11 Dec	Wizz Air Malta
05 Dec - 11 Dec	easyJet
06 Dec - 10 Dec	easyJet
05 Dec - 08 Dec	easyJet
01 Dec - 09 Dec	easyJet
02 Dec - 10 Dec	Wizz Air Malta
02 Dec - 09 Dec	Wizz Air Malta
01 Dec - 06 Dec	easyJet
05 Dec - 14 Dec	easyJet
04 Dec - 11 Dec	easyJet
10 Dec - 20 Jan	easyJet
31 Dec - 21 Jan	easyJet
31 Dec - 28 Jan	Wizz Air Malta
29 Dec - 31 Jan	Wizz Air Malta
29 Dec - 24 Jan	Ryanair
30 Dec - 28 Jan	easyJet
15 Dec - 21 Jan	easyJet
12 Dec - 12 Jan	easyJet
16 Dec - 12 Jan	easyJet
30 Dec - 12 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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from London to Buenos Aires in December from $1054

Return flights