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

Return flights

30 Sep - 14 Oct	Iberia
28 Sep - 13 Oct	Turkish Airlines
28 Sep - 18 Oct	jetBlue
20 Sep - 11 Oct	Iberia
27 Sep - 08 Oct	Iberia
23 Sep - 30 Sep	SWISS
23 Sep - 18 Oct	jetBlue
26 Sep - 02 Oct	Austrian Airlines
26 Sep - 07 Oct	jetBlue
22 Sep - 18 Oct	jetBlue
24 Sep - 04 Oct	Iberia
26 Sep - 30 Sep	Austrian Airlines
22 Sep - 29 Sep	Condor
21 Sep - 26 Sep	jetBlue
22 Sep - 28 Sep	Condor
22 Sep - 27 Sep	jetBlue
20 Sep - 27 Sep	jetBlue
23 Sep - 30 Sep	Air France	direct
26 Sep - 30 Sep	Air France	direct
22 Sep - 29 Sep	Air France	direct

Also check the deals for one-way flights from Boston 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 Boston to Athens in September from $513

Return flights