Cheapest return flights from London to Helsinki in September from $87

Best time to book flights for London (STN) to Helsinki (HEL) flights at AirHint

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

Return flights

17 Sep - 24 Sep Ryanair direct
23 Sep - 24 Sep Ryanair direct
17 Sep - 30 Sep Ryanair direct
23 Sep - 30 Sep Ryanair direct
09 Sep - 24 Sep Ryanair direct
12 Sep - 24 Sep Ryanair direct
20 Sep - 24 Sep Ryanair direct
15 Sep - 24 Sep Ryanair direct
12 Sep - 30 Sep Ryanair direct
09 Sep - 14 Sep Ryanair direct
30 Sep - 02 Oct Ryanair direct
30 Sep - 20 Oct Ryanair direct
17 Sep - 02 Oct Ryanair direct
23 Sep - 02 Oct Ryanair direct
12 Sep - 02 Oct Ryanair direct
20 Sep - 02 Oct Ryanair direct
15 Sep - 02 Oct Ryanair direct

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

Skyscanner

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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