Cheapest return flights from Boston to Helsinki in December from 333€

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

Return flights

10 Dec - 17 Dec Icelandair
01 Dec - 08 Dec Scandinavian Airlines
07 Dec - 14 Dec Scandinavian Airlines
04 Dec - 11 Dec Icelandair
05 Dec - 14 Dec Lufthansa
13 Dec - 20 Dec Icelandair
12 Dec - 23 Dec Scandinavian Airlines
17 Dec - 23 Dec Finnair
19 Dec - 26 Dec Icelandair
28 Dec - 04 Jan Scandinavian Airlines
18 Dec - 25 Dec Icelandair
20 Dec - 04 Jan Icelandair

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

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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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