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

Return flights

06 Dec - 10 Dec	Ryanair
07 Dec - 14 Dec	Ryanair
10 Dec - 13 Dec	Norwegian Air Sweden AOC
06 Dec - 13 Dec	Ryanair
10 Dec - 14 Dec	Norwegian Air Sweden AOC
06 Dec - 09 Dec	Lufthansa
06 Dec - 11 Dec	Ryanair
31 Dec - 12 Jan	Ryanair
12 Dec - 14 Dec	Ryanair
12 Dec - 15 Dec	Ryanair
14 Dec - 17 Dec	Norwegian Air Sweden AOC
31 Dec - 07 Jan	Ryanair
30 Dec - 12 Jan	Scandinavian Airlines
30 Dec - 08 Jan	airBaltic
30 Dec - 06 Jan	airBaltic
31 Dec - 06 Jan	Ryanair
29 Dec - 09 Jan	Norwegian Air Sweden AOC
30 Dec - 07 Jan	Ryanair
18 Dec - 05 Jan	Ryanair
28 Dec - 06 Jan	airBaltic

Also check the deals for one-way 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 return flights from Helsinki to Lisbon in December from 135€

Return flights