AirHint found the following cheapest one-way flights from Helsinki (HEL) to Lisbon (LIS) in December 2025 (see full year).

One-Way flights

10 Dec	Ryanair
04 Dec	KLM
12 Dec	Ryanair
12 Dec	Finnair	direct
04 Dec	Finnair	direct
10 Dec	Finnair	direct
30 Dec	Norwegian Air Sweden AOC
29 Dec	Norwegian Air Sweden AOC
31 Dec	Norwegian Air Sweden AOC
27 Dec	Finnair

Also check the deals for return flights from Helsinki to Lisbon 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 one-way flights from Helsinki to Lisbon in December from 91€

One-Way flights