AirHint found the following cheapest return flights from Porto (OPO) to Helsinki (HEL) in March 2026 (see full year).

Return flights

12 Mar - 15 Mar	Ryanair
04 Mar - 07 Mar	Ryanair
04 Mar - 09 Mar	Ryanair
09 Mar - 15 Mar	Ryanair
18 Mar - 22 Mar	Ryanair
19 Mar - 22 Mar	Ryanair
12 Mar - 21 Mar	Ryanair
18 Mar - 21 Mar	Ryanair
12 Mar - 18 Mar	Ryanair
13 Mar - 16 Mar	Ryanair
27 Mar - 13 Apr	Ryanair
31 Mar - 14 Apr	Ryanair
31 Mar - 13 Apr	Ryanair
31 Mar - 07 Apr	Ryanair
31 Mar - 10 Apr	Ryanair
28 Mar - 04 Apr	Ryanair

Also check the deals for one-way flights from Porto to Helsinki in March.

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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Cheapest return flights from Porto to Helsinki in March from 118€

Return flights