Cheapest return flights from London to Helsinki in September from $197

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

26 Sep - 29 Sep Scandinavian Airlines
26 Sep - 30 Sep Scandinavian Airlines
10 Sep - 18 Sep Scandinavian Airlines
09 Sep - 16 Sep Scandinavian Airlines
01 Sep - 09 Sep Scandinavian Airlines
07 Sep - 13 Sep Scandinavian Airlines
04 Sep - 08 Sep Scandinavian Airlines
19 Sep - 22 Sep Scandinavian Airlines
25 Sep - 27 Sep Scandinavian Airlines
01 Sep - 05 Sep Scandinavian Airlines
27 Sep - 01 Oct Scandinavian Airlines
27 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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