Cheapest return flights from Boston to Helsinki in September from 302€

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

Return flights

30 Sep - 07 Oct British Airways
14 Sep - 30 Sep Finnair
10 Sep - 17 Sep Icelandair
02 Sep - 09 Sep Icelandair
04 Sep - 11 Sep Icelandair
12 Sep - 19 Sep Icelandair
23 Sep - 30 Sep Icelandair
05 Sep - 19 Sep Icelandair
29 Sep - 06 Oct Icelandair
16 Sep - 23 Sep Scandinavian Airlines
08 Sep - 15 Sep Scandinavian Airlines
18 Sep - 25 Sep Icelandair
26 Sep - 03 Oct Scandinavian Airlines

Also check the deals for one-way flights from Boston to Helsinki in September.

Skyscanner

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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