AirHint found the following cheapest one-way flights from Helsinki (HEL) to Boston (BOS) in December 2025 (see full year).
One-Way flights
| 13 Dec | airBaltic | ||
| 26 Dec | airBaltic | ||
| 29 Dec | Icelandair | ||
| 27 Dec | Delta | ||
| 20 Dec | Air France |
Also check the deals for return flights from Helsinki to Boston in December.
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