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

Return flights

01 Dec - 08 Dec	ITA Airways
03 Dec - 10 Dec	Lufthansa
03 Dec - 12 Dec	TAP
03 Dec - 24 Dec	Lufthansa
13 Dec - 25 Jan	SWISS
31 Dec - 18 Jan	Ryanair
09 Dec - 20 Jan	Ryanair
12 Dec - 23 Jan	Lufthansa
13 Dec - 22 Dec	Ryanair
18 Dec - 31 Jan	Brussels Airlines
05 Dec - 20 Dec	Lufthansa
24 Dec - 17 Jan	Air Europa
05 Dec - 29 Dec	TAP
14 Dec - 16 Jan	Ryanair
23 Dec - 18 Jan	Ryanair
13 Dec - 16 Jan	Ryanair
23 Dec - 17 Jan	Ryanair
05 Dec - 27 Dec	TAP
05 Dec - 28 Dec	TAP
12 Dec - 30 Dec	Lufthansa

Also check the deals for one-way flights from Brussels 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 Brussels to Buenos Aires in December from 1044€

Return flights