AirHint found the following cheapest return flights from San Sebastian (EAS) to Athens (ATH) in September 2025 (see full year).

Return flights

29 Sep - 04 Oct	Vueling Airlines
29 Sep - 11 Oct	Vueling Airlines
08 Sep - 29 Sep	Vueling Airlines
29 Sep - 19 Oct	Vueling Airlines
01 Sep - 05 Sep	Vueling Airlines
29 Sep - 03 Oct	Vueling Airlines
17 Sep - 19 Sep	Vueling Airlines
08 Sep - 13 Sep	Vueling Airlines
01 Sep - 13 Sep	Vueling Airlines
01 Sep - 07 Sep	Vueling Airlines

Also check the deals for one-way flights from San Sebastian 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.

Book a cheap hotel in Athens

Cheap car rent in Athens

Cheapest return flights from San Sebastian to Athens in September from 222€

Return flights