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

Return flights

07 May - 10 May	Scandinavian Airlines
05 May - 08 May	Scandinavian Airlines
22 May - 25 May	Scandinavian Airlines
02 May - 04 May	KLM
15 May - 17 May	Lufthansa
01 May - 04 May	Scandinavian Airlines
05 May - 08 May	Finnair	direct
29 May - 01 Jun	Scandinavian Airlines
07 May - 10 May	Finnair	direct
22 May - 25 May	Finnair	direct
15 May - 17 May	Finnair	direct
29 May - 01 Jun	Finnair	direct

Also check the deals for one-way flights from London to Helsinki 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 London to Helsinki in May from 167€

Return flights