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

Return flights

03 Dec - 10 Dec	Ryanair
06 Dec - 10 Dec	Ryanair
05 Dec - 12 Dec	Ryanair
10 Dec - 17 Dec	Ryanair
11 Dec - 17 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
10 Dec - 15 Dec	Ryanair
09 Dec - 14 Dec	Ryanair
05 Dec - 13 Dec	Ryanair
05 Dec - 07 Dec	Ryanair
31 Dec - 14 Jan	KLM
31 Dec - 12 Jan	Norwegian Air Sweden AOC
29 Dec - 08 Jan	airBaltic
29 Dec - 09 Jan	airBaltic
31 Dec - 07 Jan	KLM
29 Dec - 12 Jan	Ryanair
31 Dec - 08 Jan	KLM
31 Dec - 11 Jan	Ryanair
31 Dec - 06 Jan	KLM
17 Dec - 06 Jan	Norwegian Air Sweden AOC

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 $165

Return flights