Cheapest one-way flights from London to Helsinki in September from $107

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

AirHint found the following cheapest one-way flights from London (LHR) to Helsinki (HEL) in September 2025 (see full year).

One-Way flights

16 Sep Scandinavian Airlines
29 Sep Scandinavian Airlines
05 Sep Scandinavian Airlines
23 Sep Scandinavian Airlines
12 Sep Scandinavian Airlines
03 Sep Scandinavian Airlines
07 Sep Scandinavian Airlines
20 Sep Scandinavian Airlines
13 Sep Scandinavian Airlines
20 Sep Finnair direct

Also check the deals for return 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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