Cheapest return flights from London to Helsinki in September from $261

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

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

Return flights

09 Sep - 15 Sep KLM
17 Sep - 15 Oct KLM
03 Sep - 09 Sep KLM
05 Sep - 09 Sep KLM
11 Sep - 23 Sep Lufthansa
03 Sep - 08 Sep Lufthansa
04 Sep - 08 Sep Lufthansa
08 Sep - 15 Sep KLM
01 Sep - 09 Sep Lufthansa
01 Sep - 08 Sep Lufthansa
06 Sep - 07 Sep KLM
28 Sep - 05 Oct KLM

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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