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

Return flights

27 Sep - 06 Oct	Air France
25 Sep - 09 Oct	Air France
27 Sep - 05 Oct	Air France
09 Sep - 23 Sep	Air France
11 Sep - 26 Sep	Norwegian Air Sweden AOC
30 Sep - 07 Oct	Air France
29 Sep - 06 Oct	Air France
04 Sep - 18 Sep	Norwegian Air Sweden AOC
02 Sep - 26 Sep	Air France
13 Sep - 28 Sep	Air France
01 Sep - 31 Oct	Ryanair
04 Sep - 27 Sep	Air France
02 Sep - 31 Oct	Finnair

Also check the deals for one-way flights from Helsinki to Plaisance in September.

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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Cheapest return flights from Helsinki to Plaisance in September from 800€

Return flights