Cheapest return flights from London to Helsinki in September from 76€

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

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

Return flights

17 Sep - 05 Oct Ryanair direct
17 Sep - 27 Sep Ryanair direct
10 Sep - 27 Sep Ryanair direct
15 Sep - 05 Oct Ryanair direct
20 Sep - 05 Oct Ryanair direct
15 Sep - 27 Sep Ryanair direct
10 Sep - 11 Sep Ryanair direct
20 Sep - 27 Sep Ryanair direct
14 Sep - 27 Sep Ryanair direct
12 Sep - 14 Sep Ryanair direct
06 Sep - 11 Sep Ryanair direct
06 Sep - 10 Sep Ryanair direct
18 Sep - 21 Sep Norwegian Air Sweden AOC
14 Sep - 05 Oct Ryanair
23 Sep - 05 Oct Scandinavian Airlines
14 Sep - 05 Oct Norwegian Air Sweden AOC direct
18 Sep - 09 Oct Scandinavian Airlines
22 Sep - 04 Oct Scandinavian Airlines
22 Sep - 04 Oct Finnair direct
23 Sep - 05 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