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

Return flights

01 Sep - 17 Sep	Air Canada
22 Sep - 01 Oct	Air Canada
23 Sep - 02 Oct	Air Canada
28 Sep - 08 Oct	Air Canada
10 Sep - 17 Sep	Air Canada
23 Sep - 03 Oct	Air Canada
01 Sep - 09 Sep	Air Canada
02 Sep - 25 Sep	Air Canada
15 Sep - 25 Sep	Air Canada
10 Sep - 24 Sep	Air Canada
30 Sep - 07 Oct	Air Canada
01 Sep - 15 Sep	Air Canada
16 Sep - 23 Sep	Air Canada
16 Sep - 25 Sep	Air Canada
20 Sep - 02 Oct	Air Canada
14 Sep - 24 Sep	SWISS
22 Sep - 17 Oct	Air Canada
16 Sep - 28 Oct	Air Canada
01 Sep - 24 Oct	Air Canada
30 Sep - 15 Oct	Air Canada

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 $399

Return flights