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

Return flights

04 Oct - 09 Oct	Ryanair
05 Oct - 07 Oct	Norwegian Air Sweden AOC
04 Oct - 08 Oct	Ryanair
06 Oct - 09 Oct	Ryanair
29 Oct - 05 Nov	Ryanair
05 Oct - 13 Oct	Norwegian Air Sweden AOC
06 Oct - 07 Oct	Norwegian Air Sweden AOC
07 Oct - 15 Oct	Ryanair
04 Oct - 06 Oct	Ryanair
29 Oct - 03 Nov	Ryanair
25 Oct - 29 Oct	Ryanair
04 Oct - 10 Oct	Ryanair
29 Oct - 04 Nov	Ryanair
27 Oct - 03 Nov	Ryanair
28 Oct - 04 Nov	Lufthansa
01 Oct - 05 Nov	Norwegian Air Sweden AOC
26 Oct - 03 Nov	Ryanair
31 Oct - 03 Nov	Ryanair
28 Oct - 03 Nov	Ryanair
19 Oct - 02 Nov	Norwegian Air Sweden AOC

Also check the deals for one-way flights from Helsinki to Lisbon 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 Helsinki to Lisbon in October from 144€

Return flights