AirHint found the following cheapest return flights from Athens (ATH) to Helsinki (HEL) in September 2026 (see full year).
Return flights
| 01 Sep - 05 Sep | Norwegian Air Sweden AOC | direct | |
| 01 Sep - 21 Sep | Norwegian Air Sweden AOC | ||
| 08 Sep - 21 Sep | Norwegian Air Sweden AOC | ||
| 15 Sep - 21 Sep | Norwegian Air Sweden AOC |
Also check the deals for one-way flights from Athens to Helsinki in September.
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