AirHint found the following cheapest return flights from Boston (BOS) to Helsinki (HEL) in May 2026 (see full year).
Return flights
| 15 May - 19 May | Icelandair | ||
| 18 May - 27 May | Icelandair | ||
| 13 May - 20 May | Icelandair | ||
| 23 May - 30 May | Icelandair | ||
| 03 May - 10 May | Scandinavian Airlines | ||
| 02 May - 23 May | Lufthansa |
Also check the deals for one-way flights from Boston to Helsinki in May.
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