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

One-Way flights

23 Sep	Spirit Airlines
24 Sep	Spirit Airlines
09 Sep	Spirit Airlines
10 Sep	Spirit Airlines
01 Sep	Spirit Airlines
22 Sep	Spirit Airlines
15 Sep	Spirit Airlines
19 Sep	Spirit Airlines
28 Sep	Spirit Airlines
07 Sep	Spirit Airlines

Also check the deals for return 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 one-way flights from Boston to Athens in September from 162€

One-Way flights