AirHint found the following cheapest return flights from Helsinki (HEL) to Porto (OPO) in May 2025 (see full year).
22 May - 26 May | Norwegian Air Sweden AOC | ||
22 May - 05 Jun | Norwegian Air Sweden AOC | ||
21 May - 25 May | Scandinavian Airlines | ||
14 May - 20 May | Lufthansa |
Also check the deals for one-way flights from Helsinki to Porto in May.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.