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

Return flights

06 Dec - 11 Dec	Ryanair
06 Dec - 09 Dec	Ryanair
06 Dec - 12 Dec	Ryanair
11 Dec - 14 Dec	Norwegian Air Sweden AOC
10 Dec - 17 Dec	Lufthansa
01 Dec - 05 Dec	Ryanair
05 Dec - 08 Dec	Ryanair
12 Dec - 16 Dec	Lufthansa
05 Dec - 12 Dec	Ryanair
05 Dec - 09 Dec	Ryanair
30 Dec - 04 Jan	Norwegian Air Sweden AOC
25 Dec - 01 Jan	airBaltic
29 Dec - 05 Jan	TAP
10 Dec - 03 Jan	Ryanair
29 Dec - 04 Jan	Vueling Airlines
29 Dec - 05 Jan	Finnair	direct
27 Dec - 02 Jan	easyJet
29 Dec - 04 Jan	Finnair	direct
30 Dec - 04 Jan	Finnair	direct
27 Dec - 03 Jan	Ryanair

Also check the deals for one-way flights from Lisbon 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 Lisbon to Helsinki in December from 189€

Return flights