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

Return flights

03 Sep - 12 Sep	Air Canada
14 Sep - 15 Oct	Air Canada
10 Sep - 18 Sep	Air Canada
09 Sep - 18 Sep	Air Canada
17 Sep - 25 Sep	Air Canada
03 Sep - 11 Sep	Air Canada
13 Sep - 25 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
03 Sep - 16 Sep	Air Canada
02 Sep - 16 Sep	Air Canada
16 Sep - 30 Sep	Air Canada
24 Sep - 02 Oct	Air Canada
22 Sep - 06 Oct	Air Canada
15 Sep - 14 Oct	United
15 Sep - 16 Oct	United
14 Sep - 16 Oct	Delta
30 Sep - 15 Oct	SWISS
14 Sep - 14 Oct	SWISS
29 Sep - 14 Oct	Scandinavian Airlines
09 Sep - 07 Oct	Delta

Also check the deals for one-way flights from Newark 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 Newark to Athens in September from 322€

Return flights