Cheapest return flights from Boston (BOS) to Helsinki (HEL), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
29 Sep 15 Oct Scandinavian Airlines
28 Sep 15 Oct Scandinavian Airlines
30 Sep 15 Oct Scandinavian Airlines
29 Sep 19 Oct Scandinavian Airlines
29 Sep 21 Oct Scandinavian Airlines
29 Sep 22 Oct Scandinavian Airlines
29 Sep 13 Oct Scandinavian Airlines
27 Sep 04 Oct Scandinavian Airlines
28 Sep 05 Oct Scandinavian Airlines
29 Sep 06 Oct Scandinavian Airlines
03 Sep 14 Sep Lufthansa
07 Sep 14 Sep Air France
15 Sep 22 Sep Air France
16 Sep 23 Sep Air France
09 Sep 19 Sep Lufthansa
08 Sep 15 Sep KLM
14 Sep 21 Sep KLM
03 Sep 10 Sep Scandinavian Airlines
02 Sep 09 Sep Scandinavian Airlines
13 Sep 20 Sep Scandinavian Airlines
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deals for one-way flights from Boston to Helsinki in September.

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Updated Aug 25, 2026.

About these fares

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