Cheapest return flights from London to Helsinki in September from 148€

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

03 Sep - 09 Sep Scandinavian Airlines
17 Sep - 22 Sep Scandinavian Airlines
15 Sep - 19 Sep Scandinavian Airlines
19 Sep - 24 Sep Scandinavian Airlines
12 Sep - 16 Sep Scandinavian Airlines
29 Sep - 06 Oct Scandinavian Airlines
24 Sep - 30 Sep Scandinavian Airlines
10 Sep - 12 Sep Scandinavian Airlines
25 Sep - 27 Sep Scandinavian Airlines
26 Sep - 29 Sep Scandinavian Airlines
04 Sep - 10 Sep Scandinavian Airlines
29 Sep - 06 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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