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

Return flights

10 Dec - 12 Dec	easyJet
11 Dec - 12 Dec	Ryanair
11 Dec - 18 Dec	Vueling Airlines
31 Dec - 05 Jan	KLM
19 Dec - 23 Dec	Ryanair
11 Dec - 19 Dec	Vueling Airlines
27 Dec - 04 Jan	KLM
20 Dec - 23 Dec	KLM
26 Dec - 03 Jan	KLM
26 Dec - 31 Dec	KLM
11 Dec - 31 Dec	Vueling Airlines
11 Dec - 29 Dec	Vueling Airlines
20 Dec - 31 Dec	Vueling Airlines
20 Dec - 05 Jan	Vueling Airlines
27 Dec - 05 Jan	Vueling Airlines
20 Dec - 04 Jan	Vueling Airlines

Also check the deals for one-way flights from Brussels to Basel 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 Basel in December from 146€

Return flights