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

Return flights

08 Sep - 22 Sep	Air Canada
02 Sep - 18 Sep	SWISS
30 Sep - 15 Oct	TAP
06 Sep - 18 Sep	Air Canada
01 Sep - 30 Sep	American Airlines
03 Sep - 12 Sep	American Airlines
07 Sep - 24 Sep	American Airlines
01 Sep - 10 Sep	SWISS
10 Sep - 24 Sep	SWISS
04 Sep - 12 Sep	Brussels Airlines
13 Sep - 23 Sep	Brussels Airlines
25 Sep - 09 Oct	TAP
30 Sep - 13 Oct	TAP
21 Sep - 08 Oct	Air Canada
25 Sep - 01 Oct	TAP
15 Sep - 01 Oct	American Airlines
15 Sep - 08 Oct	SWISS
12 Sep - 01 Oct	LOT	direct
17 Sep - 01 Oct	SWISS
19 Sep - 01 Oct	Scandinavian Airlines

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 $379

Return flights