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

Return flights

03 Sep - 10 Sep	jetBlue
17 Sep - 24 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
09 Sep - 16 Sep	jetBlue
14 Sep - 21 Sep	jetBlue
04 Sep - 11 Sep	Air Canada
07 Sep - 17 Sep	United
28 Sep - 05 Oct	Virgin Atlantic
07 Sep - 14 Sep	jetBlue
20 Sep - 27 Sep	jetBlue
24 Sep - 08 Oct	Delta
10 Sep - 23 Sep	Delta
25 Sep - 09 Oct	Delta
20 Sep - 11 Oct	Delta
29 Sep - 12 Oct	Delta
08 Sep - 13 Oct	Emirates

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 493€

Return flights