AirHint found the following cheapest return flights from Porto (OPO) to Helsinki (HEL) in December 2025 (see full year).

Return flights

03 Dec - 06 Dec	Ryanair
10 Dec - 12 Dec	Ryanair
04 Dec - 12 Dec	Ryanair
03 Dec - 11 Dec	Ryanair
04 Dec - 07 Dec	Ryanair
09 Dec - 12 Dec	Ryanair
08 Dec - 12 Dec	Ryanair
01 Dec - 06 Dec	Ryanair
08 Dec - 11 Dec	easyJet
04 Dec - 08 Dec	Ryanair
31 Dec - 05 Jan	Ryanair
22 Dec - 04 Jan	Ryanair
25 Dec - 01 Jan	Wizz Air Malta
22 Dec - 06 Jan	Ryanair
23 Dec - 03 Jan	Ryanair
29 Dec - 05 Jan	Scandinavian Airlines
20 Dec - 03 Jan	Ryanair
22 Dec - 02 Jan	Ryanair
29 Dec - 04 Jan	Ryanair
26 Dec - 03 Jan	Ryanair

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

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 December from 170€

Return flights