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

Return flights

01 Sep - 16 Sep	SWISS
11 Sep - 25 Sep	Air Canada
01 Sep - 18 Sep	American Airlines
02 Sep - 16 Sep	American Airlines
01 Sep - 08 Sep	SWISS
13 Sep - 22 Sep	SWISS
10 Sep - 25 Sep	SWISS
15 Sep - 29 Sep	Air Canada
24 Sep - 08 Oct	Finnair
01 Sep - 10 Sep	SWISS
15 Sep - 07 Oct	American Airlines
29 Sep - 14 Oct	American Airlines
11 Sep - 30 Sep	SWISS
15 Sep - 29 Oct	SWISS
29 Sep - 10 Oct	Scandinavian Airlines
13 Sep - 04 Oct	Scandinavian Airlines
23 Sep - 21 Oct	SWISS
19 Sep - 01 Oct	Scandinavian Airlines
19 Sep - 05 Oct	Scandinavian Airlines
15 Sep - 29 Oct	LOT	direct

Also check the deals for one-way flights from New York to Warsaw 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 New York to Warsaw in September from $386

Return flights