AirHint found the following cheapest return flights from Helsinki (HEL) to Lisbon (LIS) in May 2026 (see full year).

Return flights

15 May - 27 May	Lufthansa
21 May - 25 May	airBaltic
08 May - 15 May	airBaltic
22 May - 01 Jun	Lufthansa
15 May - 24 May	Lufthansa
08 May - 15 May	Finnair	direct
21 May - 25 May	Finnair	direct
15 May - 27 May	Finnair	direct
15 May - 24 May	Finnair	direct

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

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 May from $301

Return flights