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

Return flights

26 Sep - 29 Sep	Delta
02 Sep - 09 Oct	Delta
23 Sep - 29 Sep	Delta
10 Sep - 17 Sep	Icelandair
04 Sep - 15 Sep	Delta
03 Sep - 09 Sep	Icelandair
01 Sep - 15 Sep	Delta
10 Sep - 17 Sep	British Airways	direct
01 Sep - 07 Sep	Icelandair
23 Sep - 18 Oct	Icelandair
21 Sep - 07 Oct	British Airways	direct
03 Sep - 14 Sep	Air France
05 Sep - 11 Sep	Icelandair
29 Sep - 06 Oct	Scandinavian Airlines
30 Sep - 07 Oct	Finnair
25 Sep - 02 Oct	Scandinavian Airlines
27 Sep - 05 Oct	Scandinavian Airlines
26 Sep - 03 Oct	Finnair
27 Sep - 04 Oct	Scandinavian Airlines
25 Sep - 02 Oct	Finnair	direct

Also check the deals for one-way flights from New York to Helsinki 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 Helsinki in September from $361

Return flights