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

Return flights

05 Dec - 12 Dec	Ryanair
02 Dec - 18 Dec	Ryanair
04 Dec - 11 Dec	Ryanair
21 Dec - 23 Jan	Ryanair
12 Dec - 23 Dec	Ryanair
13 Dec - 20 Dec	Ryanair
22 Dec - 12 Jan	Ryanair
24 Dec - 10 Jan	Ryanair
23 Dec - 11 Jan	Ryanair
17 Dec - 10 Jan	Ryanair
18 Dec - 31 Dec	Ryanair
19 Dec - 21 Dec	Volotea
19 Dec - 10 Jan	Ryanair
13 Dec - 03 Jan	Ryanair
23 Dec - 13 Jan	Lufthansa
15 Dec - 04 Jan	Ryanair
21 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Luxemburg 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.

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Cheapest return flights from Luxemburg to Buenos Aires in December from $1386

Return flights