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

Return flights

09 Sep - 18 Sep	United
09 Sep - 23 Sep	United
23 Sep - 07 Oct	United
16 Sep - 23 Sep	Delta
22 Sep - 18 Oct	United
15 Sep - 01 Oct	Delta
08 Sep - 15 Sep	United
29 Sep - 20 Oct	Delta
26 Sep - 24 Oct	Delta
25 Sep - 07 Oct	Delta
07 Sep - 22 Sep	Delta
08 Sep - 04 Oct	United
22 Sep - 26 Sep	Delta
28 Sep - 05 Oct	Delta
09 Sep - 04 Oct	United
09 Sep - 27 Sep	United
09 Sep - 14 Sep	United
08 Sep - 14 Sep	United
07 Sep - 11 Sep	Delta
19 Sep - 03 Oct	United

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 387€

Return flights