AirHint found the following cheapest return flights from Lisbon (LIS) to Helsinki (HEL) in May 2026 (see full year).
Return flights
| 07 May - 11 May | Lufthansa | ||
| 14 May - 17 May | Lufthansa | ||
| 10 May - 18 May | Ryanair | ||
| 14 May - 17 May | TAP | direct | |
| 07 May - 11 May | TAP | direct | |
| 10 May - 18 May | TAP | direct |
Also check the deals for one-way flights from Lisbon to Helsinki in May.
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