AirHint found the following cheapest return flights from Bilbao (BIO) to Athens (ATH) in September 2026 (see full year).

Return flights

08 Sep - 15 Sep	easyJet
22 Sep - 29 Sep	Aegean Airlines
22 Sep - 30 Sep	Aegean Airlines
15 Sep - 22 Sep	easyJet
07 Sep - 15 Sep	Wizz Air Malta
28 Sep - 15 Oct	Vueling Airlines
15 Sep - 29 Sep	easyJet
27 Sep - 06 Oct	easyJet
09 Sep - 17 Sep	easyJet
24 Sep - 29 Sep	easyJet
15 Sep - 21 Sep	easyJet
08 Sep - 16 Sep	Vueling Airlines
28 Sep - 08 Oct	Wizz Air UK
25 Sep - 15 Oct	Vueling Airlines
28 Sep - 15 Oct	Volotea	direct
15 Sep - 05 Oct	Vueling Airlines
21 Sep - 08 Oct	Vueling Airlines
21 Sep - 05 Oct	Vueling Airlines
27 Sep - 15 Oct	Vueling Airlines
22 Sep - 08 Oct	Vueling Airlines

Also check the deals for one-way flights from Bilbao to Athens 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 Bilbao to Athens in September from $151

Return flights