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

Return flights

15 Sep - 18 Sep	easyJet	direct
30 Sep - 07 Oct	easyJet	direct
13 Sep - 01 Oct	SWISS	direct
16 Sep - 25 Sep	easyJet	direct
01 Sep - 03 Sep	SWISS	direct
23 Sep - 30 Sep	SWISS	direct
24 Sep - 03 Oct	easyJet	direct
23 Sep - 27 Sep	SWISS	direct
01 Sep - 06 Sep	SWISS	direct
07 Sep - 13 Sep	SWISS	direct
03 Sep - 09 Sep	SWISS	direct
20 Sep - 27 Sep	SWISS	direct
01 Sep - 04 Sep	SWISS	direct
12 Sep - 02 Oct	SWISS	direct
13 Sep - 02 Oct	SWISS	direct
22 Sep - 02 Oct	SWISS	direct
27 Sep - 04 Oct	SWISS	direct
23 Sep - 04 Oct	easyJet	direct
20 Sep - 05 Oct	SWISS
25 Sep - 15 Oct	Vueling Airlines

Also check the deals for one-way flights from Geneva 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 Geneva to Athens in September from $105

Return flights