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

Return flights

18 Sep - 22 Sep	Ryanair
04 Sep - 08 Sep	Wizz Air Malta
24 Sep - 01 Oct	Ryanair
12 Sep - 23 Sep	Ryanair
04 Sep - 13 Sep	Ryanair
18 Sep - 29 Sep	Ryanair
24 Sep - 30 Sep	Ryanair
08 Sep - 15 Sep	Ryanair
08 Sep - 10 Sep	Ryanair
15 Sep - 23 Sep	Ryanair
04 Sep - 10 Sep	Ryanair
25 Sep - 03 Oct	Wizz Air Malta
27 Sep - 04 Oct	Wizz Air Malta
25 Sep - 02 Oct	Wizz Air Malta
26 Sep - 03 Oct	easyJet
27 Sep - 02 Oct	Wizz Air Malta

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 151€

Return flights