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

Return flights

25 Jun - 12 Jul	Ryanair	direct
30 Jun - 05 Jul	Ryanair
25 Jun - 05 Jul	Ryanair	direct
30 Jun - 09 Jul	Ryanair
24 Jun - 25 Jun	Ryanair	direct
25 Jun - 11 Jul	Ryanair	direct
23 Jun - 25 Jun	Ryanair
25 Jun - 09 Jul	Ryanair	direct
30 Jun - 18 Jul	Ryanair
30 Jun - 12 Jul	Ryanair	direct
24 Jun - 12 Jul	Ryanair	direct
30 Jun - 05 Jul	Ryanair	direct
25 Jun - 30 Jun	Ryanair	direct
21 Jun - 25 Jun	Ryanair
10 Jun - 25 Jun	Ryanair
12 Jun - 25 Jun	Ryanair
23 Jun - 30 Jun	Ryanair
16 Jun - 25 Jun	Ryanair
17 Jun - 25 Jun	Ryanair
21 Jun - 25 Jun	Ryanair	direct

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 131€

Return flights