AirHint found the following cheapest return flights from Warsaw (WAW) to Helsinki (HEL) in September 2026 (see full year).
Return flights
| 13 Sep - 01 Oct | Ryanair | direct | |
| 14 Sep - 21 Sep | airBaltic | ||
| 14 Sep - 21 Sep | Finnair | direct | |
| 26 Sep - 03 Oct | Finnair | ||
| 26 Sep - 03 Oct | Finnair | direct |
Also check the deals for one-way flights from Warsaw to Helsinki in September.
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