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

Return flights

25 Sep - 05 Oct	Scandinavian Airlines
30 Sep - 20 Oct	British Airways
11 Sep - 13 Oct	British Airways
11 Sep - 15 Oct	British Airways
11 Sep - 11 Oct	British Airways
18 Sep - 15 Oct	British Airways
30 Sep - 11 Oct	British Airways
16 Sep - 29 Sep	KLM
17 Sep - 16 Oct	Delta
17 Sep - 18 Oct	Delta
24 Sep - 01 Oct	Delta
24 Sep - 30 Sep	Delta
18 Sep - 25 Sep	Delta
09 Sep - 28 Sep	KLM
10 Sep - 30 Sep	Air France
10 Sep - 22 Sep	Delta
10 Sep - 15 Sep	Delta
23 Sep - 30 Sep	Delta
16 Sep - 22 Sep	Delta
12 Sep - 27 Sep	Delta

Also check the deals for one-way flights from Warsaw to Newark 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 Warsaw to Newark in September from $451

Return flights