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

Return flights

16 Sep - 23 Sep	Delta
22 Sep - 08 Oct	Delta
24 Sep - 08 Oct	Delta
16 Sep - 24 Sep	Delta
10 Sep - 24 Sep	jetBlue
23 Sep - 07 Oct	jetBlue
25 Sep - 09 Oct	Delta
26 Sep - 03 Oct	Delta
20 Sep - 01 Oct	Delta
09 Sep - 24 Sep	jetBlue
15 Sep - 30 Sep	jetBlue
17 Sep - 24 Sep	Delta
17 Sep - 25 Sep	Delta
10 Sep - 23 Sep	jetBlue
30 Sep - 06 Oct	Delta
16 Sep - 22 Sep	Delta
27 Sep - 07 Oct	Delta
09 Sep - 23 Sep	jetBlue
20 Sep - 11 Oct	Delta
20 Sep - 02 Oct	jetBlue

Also check the deals for one-way flights from Washington 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 Washington to Athens in September from $525

Return flights