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

Return flights

09 Oct - 13 Oct	Ryanair
22 Oct - 25 Oct	Ryanair
22 Oct - 04 Nov	Ryanair
30 Oct - 07 Nov	Ryanair
30 Oct - 03 Nov	Ryanair
10 Oct - 18 Oct	Ryanair
29 Oct - 05 Nov	Ryanair
22 Oct - 29 Oct	Ryanair
08 Oct - 29 Oct	Ryanair
10 Oct - 13 Oct	Ryanair
29 Oct - 02 Nov	Ryanair
02 Oct - 04 Oct	Ryanair
04 Oct - 07 Oct	Ryanair
30 Oct - 05 Nov	Ryanair
01 Oct - 05 Oct	Ryanair
10 Oct - 19 Oct	Ryanair
30 Oct - 06 Nov	Ryanair
31 Oct - 09 Nov	Ryanair
28 Oct - 04 Nov	Iberia
31 Oct - 06 Nov	Ryanair

Also check the deals for one-way flights from Lisbon to Helsinki in October.

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 October from 150€

Return flights