Cheapest one-way flights from Porto to Helsinki in September from $118

Best time to book flights for Porto (OPO) to Helsinki (HEL) flights at AirHint

AirHint found the following cheapest one-way flights from Porto (OPO) to Helsinki (HEL) in September 2025 (see full year).

One-Way flights

06 Sep Norwegian Air Sweden AOC

Also check the deals for return flights from Porto to Helsinki in September.

Skyscanner

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.

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