Cheapest return flights from London to Helsinki in September from $196

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

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

Return flights

29 Sep - 14 Oct Scandinavian Airlines
26 Sep - 29 Sep Scandinavian Airlines
25 Sep - 02 Oct Scandinavian Airlines
11 Sep - 15 Sep Scandinavian Airlines
04 Sep - 08 Sep Scandinavian Airlines
01 Sep - 10 Sep Scandinavian Airlines
16 Sep - 18 Sep Scandinavian Airlines
18 Sep - 24 Sep Scandinavian Airlines
01 Sep - 18 Sep Scandinavian Airlines
17 Sep - 20 Sep Scandinavian Airlines
18 Sep - 25 Sep Scandinavian Airlines
02 Sep - 05 Sep Scandinavian Airlines
17 Sep - 01 Oct Scandinavian Airlines
30 Sep - 04 Oct Scandinavian Airlines
27 Sep - 01 Oct Scandinavian Airlines
27 Sep - 01 Oct Finnair direct
30 Sep - 04 Oct Finnair direct
29 Sep - 14 Oct Finnair direct
25 Sep - 02 Oct Finnair direct
17 Sep - 01 Oct Finnair direct

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

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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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