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

Return flights

06 Dec - 08 Dec	Ryanair
04 Dec - 08 Dec	Ryanair
09 Dec - 12 Dec	Ryanair
03 Dec - 12 Dec	Ryanair
06 Dec - 17 Jan	Ryanair
10 Dec - 17 Dec	Ryanair
04 Dec - 10 Dec	Ryanair
01 Dec - 11 Dec	Lufthansa
01 Dec - 13 Dec	Lufthansa
10 Dec - 08 Jan	KLM
12 Dec - 08 Jan	Lufthansa
11 Dec - 07 Jan	Ryanair
11 Dec - 09 Jan	KLM
11 Dec - 08 Jan	KLM
12 Dec - 12 Jan	Ryanair
08 Dec - 12 Dec	Norwegian Air Sweden AOC
12 Dec - 24 Dec	Lufthansa
23 Dec - 12 Jan	Ryanair
23 Dec - 09 Jan	Ryanair
21 Dec - 12 Jan	Ryanair

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 $177

Return flights