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

Return flights

18 Sep - 29 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
22 Sep - 27 Sep	Ryanair
24 Sep - 27 Sep	Ryanair
19 Sep - 23 Sep	Ryanair
03 Sep - 10 Sep	Ryanair
19 Sep - 21 Sep	Ryanair
19 Sep - 22 Sep	Ryanair
05 Sep - 08 Sep	Ryanair
04 Sep - 08 Sep	Wizz Air Malta
15 Sep - 15 Oct	Ryanair
29 Sep - 05 Oct	Ryanair
29 Sep - 04 Oct	Ryanair
29 Sep - 01 Oct	Ryanair
28 Sep - 06 Oct	Ryanair
28 Sep - 06 Oct	Finnair	direct
29 Sep - 04 Oct	Finnair	direct
29 Sep - 05 Oct	Finnair	direct

Also check the deals for one-way flights from Madrid 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 Madrid to Helsinki in September from $169

Return flights