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

Return flights

10 Dec - 13 Dec	Ryanair
03 Dec - 07 Dec	Ryanair
03 Dec - 06 Dec	Ryanair
04 Dec - 07 Dec	Ryanair
03 Dec - 10 Dec	Ryanair
04 Dec - 11 Dec	Ryanair
03 Dec - 09 Dec	Ryanair
04 Dec - 10 Dec	Ryanair
04 Dec - 09 Dec	Ryanair
09 Dec - 13 Dec	Ryanair
24 Dec - 12 Jan	easyJet
17 Dec - 06 Jan	Ryanair
30 Dec - 07 Jan	Ryanair
31 Dec - 03 Jan	Ryanair
30 Dec - 05 Jan	Ryanair
22 Dec - 03 Jan	Ryanair
29 Dec - 03 Jan	Scandinavian Airlines
31 Dec - 04 Jan	Ryanair
27 Dec - 07 Jan	LOT
23 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 152€

Return flights