AirHint found the following cheapest return flights from London (STN) to Helsinki (HEL) in June 2025 (see full year).

Return flights

29 Jun - 19 Jul	Ryanair	direct
29 Jun - 09 Jul	Ryanair	direct
29 Jun - 14 Jul	Ryanair	direct
29 Jun - 05 Jul	Ryanair	direct
30 Jun - 19 Jul	Ryanair	direct
23 Jun - 07 Jul	Ryanair
25 Jun - 09 Jul	Ryanair	direct
25 Jun - 14 Jul	Ryanair	direct
26 Jun - 09 Jul	Ryanair	direct
26 Jun - 14 Jul	Ryanair	direct
23 Jun - 25 Jun	Ryanair
23 Jun - 30 Jun	Ryanair
21 Jun - 25 Jun	Ryanair
22 Jun - 24 Jun	Ryanair
24 Jun - 25 Jun	Ryanair	direct
22 Jun - 25 Jun	Ryanair	direct
23 Jun - 28 Jun	Ryanair
26 Jun - 28 Jun	Ryanair	direct
23 Jun - 25 Jun	Ryanair	direct
23 Jun - 26 Jun	Ryanair

Also check the deals for one-way flights from London to Helsinki in June.

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 June from $162

Return flights