Cheapest return LCY–HEL flights, September

AirHint found the following cheapest return flights from London (LCY) to Helsinki (HEL) in September 2026 (see full year).

Return flights

07 Sep - 22 Sep KLM
21 Sep - 30 Sep KLM
14 Sep - 20 Sep KLM
18 Sep - 20 Sep KLM
01 Sep - 13 Sep KLM
25 Sep - 28 Sep KLM
23 Sep - 28 Sep KLM
14 Sep - 22 Sep KLM
20 Sep - 28 Sep KLM
15 Sep - 22 Sep KLM
25 Sep - 02 Oct KLM
24 Sep - 01 Oct KLM

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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