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

Return flights

03 Dec - 12 Dec	Ethiopian Airlines
03 Dec - 24 Dec	Delta
07 Dec - 15 Jan	Delta
02 Dec - 27 Jan	ITA Airways
05 Dec - 20 Dec	Turkish Airlines
24 Dec - 17 Jan	Turkish Airlines
25 Dec - 15 Jan	Delta
23 Dec - 17 Jan	Turkish Airlines
11 Dec - 22 Jan	Ryanair
05 Dec - 27 Dec	Turkish Airlines
08 Dec - 11 Jan	Ethiopian Airlines
31 Dec - 18 Jan	TAP
13 Dec - 14 Dec	Lufthansa
09 Dec - 11 Jan	Ethiopian Airlines
05 Dec - 17 Dec	SWISS
06 Dec - 17 Dec	Lufthansa
12 Dec - 23 Jan	Ryanair
12 Dec - 20 Dec	Lufthansa
13 Dec - 22 Dec	easyJet
09 Dec - 31 Dec	SWISS

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 934€

Return flights