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

Return flights

28 Sep - 13 Oct	Iberia
30 Sep - 13 Oct	Iberia
15 Sep - 29 Sep	Iberia
23 Sep - 06 Oct	Iberia
16 Sep - 30 Sep	Iberia
21 Sep - 30 Sep	Iberia For Level
28 Sep - 12 Oct	Iberia
24 Sep - 04 Oct	Icelandair
03 Sep - 10 Sep	SWISS
13 Sep - 26 Sep	Icelandair
08 Sep - 21 Sep	Iberia
17 Sep - 21 Oct	British Airways
24 Sep - 01 Oct	Icelandair
04 Sep - 11 Sep	Turkish Airlines
17 Sep - 03 Oct	Turkish Airlines
25 Sep - 02 Oct	Turkish Airlines
12 Sep - 20 Sep	Iberia For Level
21 Sep - 29 Sep	Icelandair
24 Sep - 05 Oct	Spirit Airlines
11 Sep - 23 Sep	Turkish Airlines

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 415€

Return flights