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

Return flights

23 Sep - 25 Sep	Wizz Air
17 Sep - 23 Sep	Wizz Air Malta
17 Sep - 18 Sep	Wizz Air Malta
17 Sep - 08 Oct	Vueling Airlines
29 Sep - 08 Oct	Vueling Airlines
26 Sep - 08 Oct	Vueling Airlines
11 Sep - 16 Sep	Wizz Air
19 Sep - 08 Oct	Vueling Airlines
22 Sep - 08 Oct	Vueling Airlines
18 Sep - 22 Sep	Ryanair
29 Sep - 15 Oct	Vueling Airlines
17 Sep - 01 Oct	Vueling Airlines
04 Sep - 11 Sep	Ryanair
26 Sep - 15 Oct	Vueling Airlines
14 Sep - 16 Sep	Ryanair
29 Sep - 11 Oct	Vueling Airlines
25 Sep - 08 Oct	Vueling Airlines
09 Sep - 10 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
11 Sep - 14 Sep	Wizz Air

Also check the deals for one-way flights from Brussels to Basel in September.

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 September from 108€

Return flights