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

Return flights

10 Sep - 17 Sep	Icelandair
02 Sep - 09 Sep	Icelandair
16 Sep - 23 Sep	Scandinavian Airlines
01 Sep - 08 Sep	Scandinavian Airlines
27 Sep - 07 Oct	Scandinavian Airlines
07 Sep - 13 Sep	Scandinavian Airlines
09 Sep - 13 Sep	Scandinavian Airlines
04 Sep - 14 Sep	Lufthansa
04 Sep - 15 Sep	Lufthansa
29 Sep - 13 Oct	British Airways

Also check the deals for one-way flights from Newark 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 Newark to Helsinki in September from 348€

Return flights