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

Return flights

08 Sep - 16 Sep	Finnair
14 Sep - 30 Sep	Finnair
09 Sep - 18 Sep	Finnair
08 Sep - 17 Sep	Finnair
09 Sep - 16 Sep	Finnair
23 Sep - 30 Sep	Finnair
15 Sep - 30 Sep	Finnair
17 Sep - 26 Sep	Finnair
16 Sep - 30 Sep	Finnair
30 Sep - 07 Oct	Finnair
24 Sep - 15 Oct	Finnair
01 Sep - 17 Sep	Austrian Airlines
03 Sep - 08 Oct	SWISS
01 Sep - 02 Oct	SWISS
04 Sep - 06 Oct	SWISS
30 Sep - 09 Oct	SWISS
15 Sep - 07 Oct	Lufthansa
03 Sep - 08 Oct	LOT	direct
25 Sep - 01 Oct	Finnair
18 Sep - 02 Oct	Finnair

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 320€

Return flights