AirHint found the following cheapest return flights from San Sebastian (EAS) to Brussels (BRU) in October 2025 (see full year).

Return flights

13 Oct - 14 Oct	Vueling Airlines
21 Oct - 27 Oct	Vueling Airlines
14 Oct - 23 Oct	Vueling Airlines
13 Oct - 23 Oct	Vueling Airlines
20 Oct - 23 Oct	Vueling Airlines
07 Oct - 20 Oct	Vueling Airlines
14 Oct - 20 Oct	Vueling Airlines
13 Oct - 20 Oct	Vueling Airlines
07 Oct - 14 Oct	Vueling Airlines
20 Oct - 20 Oct	Vueling Airlines

Also check the deals for one-way flights from San Sebastian to Brussels in October.

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 San Sebastian to Brussels in October from 129€

Return flights