AirHint found the following cheapest return flights from Castellón (CDT) to Bilbao (BIO) in October 2025 (see full year).

Return flights

07 Oct - 11 Oct	Volotea	direct
07 Oct - 13 Oct	Volotea	direct
11 Oct - 13 Oct	Volotea	direct
04 Oct - 07 Oct	Volotea	direct
04 Oct - 13 Oct	Volotea	direct
10 Oct - 13 Oct	Iberia
08 Oct - 11 Oct	Ryanair
04 Oct - 06 Oct	Volotea
09 Oct - 11 Oct	Iberia
30 Oct - 02 Nov	Iberia
14 Oct - 17 Oct	Wizz Air Malta
31 Oct - 03 Nov	Iberia
29 Oct - 08 Nov	Wizz Air Malta

Also check the deals for one-way flights from Castellón to Bilbao 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 Castellón to Bilbao in October from 48€

Return flights