Cheapest return flights from London to Helsinki in September from $170

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

Return flights

23 Sep - 25 Sep Scandinavian Airlines
21 Sep - 25 Sep Scandinavian Airlines
04 Sep - 08 Sep Scandinavian Airlines
18 Sep - 22 Sep Scandinavian Airlines
09 Sep - 18 Sep Scandinavian Airlines
07 Sep - 13 Sep Scandinavian Airlines
03 Sep - 09 Sep Scandinavian Airlines
04 Sep - 26 Sep Scandinavian Airlines
01 Sep - 26 Sep Scandinavian Airlines
03 Sep - 26 Sep Scandinavian Airlines
24 Sep - 03 Oct Scandinavian Airlines
29 Sep - 02 Oct Scandinavian Airlines
26 Sep - 04 Oct Scandinavian Airlines
30 Sep - 03 Oct Scandinavian Airlines
28 Sep - 02 Oct Scandinavian Airlines
25 Sep - 10 Oct Scandinavian Airlines
27 Sep - 04 Oct Air France
27 Sep - 05 Oct KLM
26 Sep - 04 Oct Finnair direct
30 Sep - 03 Oct Finnair 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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