Cheapest return flights from London to Helsinki in September from 154€

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 - 06 Oct Scandinavian Airlines
25 Sep - 29 Sep Scandinavian Airlines
04 Sep - 18 Sep Scandinavian Airlines
26 Sep - 29 Sep Scandinavian Airlines
18 Sep - 24 Sep Scandinavian Airlines
22 Sep - 28 Sep Scandinavian Airlines
03 Sep - 10 Sep Scandinavian Airlines
07 Sep - 12 Sep Scandinavian Airlines
15 Sep - 22 Sep Scandinavian Airlines
01 Sep - 08 Sep Scandinavian Airlines
23 Sep - 28 Sep Scandinavian Airlines
23 Sep - 28 Oct Scandinavian Airlines
29 Sep - 04 Oct Scandinavian Airlines
26 Sep - 06 Oct Finnair direct
23 Sep - 28 Oct Finnair direct

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.

Book a cheap hotel in Helsinki

Cheap car rent in Helsinki