AirHint found the following cheapest return flights from Boston (BOS) to Helsinki (HEL) in May 2026 (see full year).
Return flights
| 20 May - 28 May | Icelandair | ||
| 17 May - 24 May | Icelandair | ||
| 07 May - 14 May | Icelandair | ||
| 02 May - 09 May | Scandinavian Airlines | ||
| 27 May - 03 Jun | Scandinavian Airlines |
Also check the deals for one-way flights from Boston to Helsinki in May.
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