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

Return flights

10 Sep - 15 Sep	Norwegian Air Sweden AOC
25 Sep - 29 Sep	Lufthansa
24 Sep - 29 Sep	Lufthansa
12 Sep - 14 Sep	Lufthansa
04 Sep - 15 Sep	Lufthansa
12 Sep - 15 Sep	Lufthansa
18 Sep - 22 Sep	Lufthansa
13 Sep - 17 Sep	Lufthansa
02 Sep - 03 Sep	Scandinavian Airlines
08 Sep - 14 Sep	Scandinavian Airlines
28 Sep - 05 Oct	Lufthansa
30 Sep - 04 Oct	Scandinavian Airlines
29 Sep - 02 Oct	airBaltic
28 Sep - 03 Oct	Lufthansa
28 Sep - 05 Oct	Air France	direct
29 Sep - 02 Oct	Finnair	direct
30 Sep - 04 Oct	Finnair	direct
28 Sep - 03 Oct	Finnair	direct

Also check the deals for one-way flights from Paris to Helsinki 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 Paris to Helsinki in September from 135€

Return flights