AirHint found the following cheapest return flights from Lisbon (LIS) to Helsinki (HEL) in September 2026 (see full year).
Return flights
| 28 Sep - 03 Oct | Vueling Airlines | ||
| 01 Sep - 08 Sep | TAP | ||
| 21 Sep - 24 Sep | Finnair | ||
| 14 Sep - 22 Sep | KLM | ||
| 01 Sep - 08 Sep | Finnair | direct | |
| 21 Sep - 24 Sep | Finnair | direct | |
| 14 Sep - 22 Sep | TAP | direct |
Also check the deals for one-way flights from Lisbon to Helsinki in September.
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